You&#39;ll need to reinstall the command line tools:

```
$ xcode-select --install
```



At work we are being asked to create XML files to pass data to another offline application that will then create a second XML file to pass back in order to update some of our data. During the process we have been discussing with the team of the other application about the structure of the XML file. 

The sample I came up with is essentially something like:

    &lt;INVENTORY&gt;
       &lt;ITEM serialNumber=&quot;something&quot; location=&quot;something&quot; barcode=&quot;something&quot;&gt;
          &lt;TYPE modelNumber=&quot;something&quot; vendor=&quot;something&quot;/&gt; 
       &lt;/ITEM&gt;
    &lt;/INVENTORY&gt;

The other team said that this was not industry standard and that attributes should only be used for meta data. They suggested:

    &lt;INVENTORY&gt;
       &lt;ITEM&gt;
          &lt;SERIALNUMBER&gt;something&lt;/SERIALNUMBER&gt;
          &lt;LOCATION&gt;something&lt;/LOCATION&gt;
          &lt;BARCODE&gt;something&lt;/BARCODE&gt;
          &lt;TYPE&gt;
             &lt;MODELNUMBER&gt;something&lt;/MODELNUMBER&gt;
             &lt;VENDOR&gt;something&lt;/VENDOR&gt;
          &lt;/TYPE&gt;
       &lt;/ITEM&gt;
    &lt;/INVENTORY&gt;

The reason I suggested the first is that the size of the file created is much smaller. There will be roughly 80000 items that will be in the file during transfer. Their suggestion in reality turns out to be three times larger than the one I suggested. I searched for the mysterious &quot;Industry Standard&quot; that was mentioned, but the closest I could find was that XML attributes should only be used for meta data, but said the debate was about what was actually meta data.

After the long winded explanation (sorry) how do you determine what is meta data, and when designing the structure of an XML document how should you decide when to use an attribute or an element?



XML attribute vs XML element

This question is motivated by my another question: https://stackoverflow.com/questions/48989065/how-to-await-in-cdef

There are tons of articles and blog posts on the web about `asyncio`, but they are all very superficial.  I couldn&#39;t find any information about how `asyncio` is actually implemented, and what makes I/O asynchronous.  I was trying to read the source code, but it&#39;s thousands of lines of not the highest grade C code, a lot of which deals with auxiliary objects, but most crucially, it is hard to connect between Python syntax and what C code it would translate into.

Asycnio&#39;s own documentation is even less helpful.  There&#39;s no information there about how it works, only some guidelines about how to use it, which are also sometimes misleading / very poorly written.

I&#39;m familiar with Go&#39;s implementation of coroutines, and was kind of hoping that Python did the same thing.  If that was the case, the code I came up in the post linked above would have worked.  Since it didn&#39;t, I&#39;m now trying to figure out why.  My best guess so far is as follows, please correct me where I&#39;m wrong:

1. Procedure definitions of the form `async def foo(): ...` are actually interpreted as methods of a class inheriting `coroutine`.
2. Perhaps, `async def` is actually split into multiple methods by `await` statements, where the object, on which these methods are called is able to keep track of the progress it made through the execution so far.
3. If the above is true, then, essentially, execution of a coroutine boils down to calling methods of coroutine object by some global manager (loop?).
4. The global manager is somehow (how?) aware of when I/O operations are performed by Python (only?) code and is able to choose one of the pending coroutine methods to execute after the current executing method relinquished control (hit on the `await` statement).

In other words, here&#39;s my attempt at &quot;desugaring&quot; of some `asyncio` syntax into something more understandable:


    async def coro(name):
        print(&#39;before&#39;, name)
        await asyncio.sleep()
        print(&#39;after&#39;, name)
    
    asyncio.gather(coro(&#39;first&#39;), coro(&#39;second&#39;))
    
    # translated from async def coro(name)
    class Coro(coroutine):
        def before(self, name):
            print(&#39;before&#39;, name)
        
        def after(self, name):
            print(&#39;after&#39;, name)
        
        def __init__(self, name):
            self.name = name
            self.parts = self.before, self.after
            self.pos = 0
        
        def __call__():
            self.parts[self.pos](self.name)
            self.pos += 1
        
        def done(self):
            return self.pos == len(self.parts)
    
    
    # translated from asyncio.gather()
    class AsyncIOManager:
    
        def gather(*coros):
            while not every(c.done() for c in coros):
                coro = random.choice(coros)
                coro()

Should my guess prove correct: then I have a problem.  How does I/O actually happen in this scenario? In a separate thread?  Is the whole interpreter suspended and I/O happens outside the interpreter?  What exactly is meant by I/O?  If my python procedure called C `open()` procedure, and it in turn sent interrupt to kernel, relinquishing control to it, how does Python interpreter know about this and is able to continue running some other code, while kernel code does the actual I/O and until it wakes up the Python procedure which sent the interrupt originally?  How can Python interpreter in principle, be aware of this happening?

How does asyncio actually work?

After upgrading to MacOS X 10.15 Catalina, I cannot run any git commands in my shell:

&gt; The default interactive shell is now zsh.
&gt;
&gt; To update your account to use zsh, please run `chsh -s /bin/zsh`.
&gt;
&gt; For more details, please visit https://support.apple.com/kb/HT208050.
&gt;
&gt; ~ | git
&gt;
&gt; xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun

I thought there&#39;s a problem with my shell, so I followed the instructions to change the default Mac OS shell back to bash, using the GUI and also using the command line: 

```
chsh -s /bin/bash
```

I also restarted the computer. However, I still see the same message, even though `echo &quot;$SHELL&quot;` outputs `/bin/bash`.


Git doesn&#39;t work on MacOS Catalina: &quot;xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing&quot;

After upgrading to MacOS X 10.15 Catalina, I cannot run any git commands in my shell:
> The default interactive shell is now zsh.
>
> To update your account to use zsh, please run <code>chsh -s /bin/zsh</code>.
>
> For more details, please visit <a href="https://support.apple.com/kb/HT208050" target="_blank" rel="noopener noreferrer">https://support.apple.com/kb/HT208050</a>.
>
> ~ | git
>
> xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
I thought there's a problem with my shell, so I followed the instructions to change the default Mac OS shell back to bash, using the GUI and also using the command line:
<pre><code class="hljs language-bash">chsh -s /bin/bash
</code></pre>
I also restarted the computer. However, I still see the same message, even though <code>echo "$SHELL"</code> outputs <code>/bin/bash</code>.

I am attempting to utilize the AWS CLI along with a `for` loop in bash to iteratively purge multiple SQS message queues.  The bash script works almost as intended, the problem I am having is with the return value each time the AWS CLI sends a request.  When the request is successful, it returns an empty value and opens up an interactive pager in the command line.  I then have to manually type `q` to exit the interactive screen and allow the `for` loop to continue to the next iteration.  This becomes very tedious and time consuming when attempting to purge a large number of queues.

Is there a way to configure AWS CLI to disable this interactive pager from popping up for every return value?  Or a way to pipe the return values into a separate file instead of being displayed?

I have played around with configuring different return value types (text, yaml, JSON) but haven&#39;t had any luck.  Also the `--no-pagination` parameter doesn&#39;t change the behavior.

Here&#39;s an example of the bash script I&#39;m trying to run:
```
for x in 1 2 3; do 
  aws sqs purge-queue --queue-url https://sqs.&lt;aws-region&gt;.amazonaws.com/&lt;id&gt;/&lt;env&gt;-$x-&lt;queueName&gt;.fifo; 
done
```

How to turn off the pager for AWS CLI return value?

&gt; error: RPC failed; curl 92 HTTP/2 stream 0 was not closed cleanly: PROTOCOL_ERROR (err 1)




I tried &#39;push&#39; while writing &#39;git&#39;.
However, the following message does not solve the problem.

[![enter image description here][1]][1]

  [1]: https://i.stack.imgur.com/w599t.png

error: RPC failed; curl 92 HTTP/2 stream 0 was not closed cleanly: PROTOCOL_ERROR (err 1)

This is surely something simple I&#39;m overlooking. In the Azure DevOps web interface (not integrated as part of an IDE), I see how to compare any commit to its parent, but I can&#39;t figure out how to compare it to an arbitrary commit.

ie, I&#39;m looking for the equivalent of [GitHub&#39;s compare/hash1..hash2](https://help.github.com/en/github/committing-changes-to-your-project/comparing-commits-across-time#comparing-commits) functionality.

The appeal is that the web UI is a view/tool common to everyone, and presumably I could get a link to the specific diff I&#39;m interested in and share it with colleagues.

The web UI suggests it _might_ be possible because when viewing the changes for a particular commit it has text `Diff to Parent 1 - &lt;my commit hash&gt;` but I haven&#39;t figured out how to change `Parent 1`.

Azure DevOps - compare two commits right in the web UI?

I have recently pushed to github, and see a white arrow on one of my folders. 

[![enter image description here][1]][1]

and when i click on the folder, it does not open it. On my local machine, it has contents, but in github i cannot access them. What does this mean?


  [1]: https://i.stack.imgur.com/RnG78.jpg

GitHub folders have a white arrow on them

After a `git pull origin master`, I get the following message:

    warning: Pulling without specifying how to reconcile divergent branches is
    discouraged. You can squelch this message by running one of the following
    commands sometime before your next pull:

      git config pull.rebase false  # merge (the default strategy)
      git config pull.rebase true   # rebase
      git config pull.ff only       # fast-forward only

    You can replace &quot;git config&quot; with &quot;git config --global&quot; to set a default
    preference for all repositories. You can also pass --rebase, --no-rebase,
    or --ff-only on the command line to override the configured default per
    invocation.

    remote: Enumerating objects: 4, done.
    remote: Counting objects: 100% (4/4), done.
    remote: Compressing objects: 100% (4/4), done.
    remote: Total 4 (delta 0), reused 0 (delta 0), pack-reused 0
    Unpacking objects: 100% (4/4), 51.49 KiB | 850.00 KiB/s, done.

The pull seems successful, but I am unsure.

What should I do?




How can I deal with this Git warning? &quot;Pulling without specifying how to reconcile divergent branches is discouraged&quot;

When I attempt to checkout a repository from github I get the error:

    error: invalid path &#39;configs/perl-modules/DIST.64/perl-HTML-Tree-1:5.03-1.el6.noarch.rpm&#39;

I suspect the issue is that the path contains a : which is illegal on Windows.

After researching the error, I&#39;ve found 2 possible answers:&lt;br&gt;
**1) Change the path on the repository file.**  Unfortunately, this is is a team resource and can not be fixed in the foreseeable future.  &lt;br&gt;
**2) Use sparse-checkout.**  I&#39;ve tried this with no effect as evidenced in the following:

&gt;$ git clone -n git@github.com:XXXXXX/deploy.git &lt;br&gt;
Cloning into &#39;deploy&#39;... &lt;br&gt;
    remote: Enumerating objects: 57, done. &lt;br&gt;
    remote: Counting objects: 100% (57/57), done. &lt;br&gt;
    remote: Compressing objects: 100% (49/49), done. &lt;br&gt;
    remote: Total 86457 (delta 10), reused 22 (delta 8), pack-reused 86400 &lt;br&gt;
    Receiving objects: 100% (86457/86457), 1.50 GiB | 4.73 MiB/s, done. &lt;br&gt;
    Resolving deltas: 100% (59779/59779), done. &lt;br&gt;
    $ cd deploy/ &lt;br&gt;
    $ git config core.sparsecheckout true &lt;br&gt;
    $ echo www &gt;&gt; .git/info/sparse-checkout &lt;br&gt;
    $ git checkout centos6 &lt;br&gt;
    error: invalid path &#39;configs/perl-modules/DIST.64/perl-HTML-Tree-1:5.03-1.el6.noarch.rpm&#39;&lt;br&gt;
    error: invalid path &#39;configs/perlbrew/perls/perl-5.24.1/man/man3/App::Cpan.3&#39;&lt;br&gt;
    .&lt;br&gt;
    . (repeat for many files)&lt;br&gt;
    .&lt;br&gt;

This was done with Git for Windows &quot;git version 2.28.0.windows.1&quot;.  I have also tried both types of line endings and using various version of .git/info/sparse-checkout such as:

    /*
    !/configs/perl-modules
    !/configs/perlbrew/perls/perl-5.24.1/man/man3

Checkout works fine on Linux, MacOS and WSL, only problem is that my IDEs don&#39;t work there.  Why isn&#39;t sparse-checkout working on Windows.  Is there any other possibilities?  

github/git Checkout Returns &#39;error: invalid path&#39; on Windows

I updated to MacOS 10.15 (Catalina) today. When I run `mongod` in the terminal it cannot find the `/data/db` directory:

    ➜  /Users/william &gt; mongod
    2019-10-08T17:02:44.183+0800 I CONTROL  [main] Automatically disabling TLS 1.0, to force-enable TLS 1.0 specify --sslDisabledProtocols &#39;none&#39;
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten] MongoDB starting : pid=43162 port=27017 dbpath=/data/db 64-bit host=Williams-MacBook-Pro-6.local
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten] db version v4.0.3
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten] git version: 7ea530946fa7880364d88c8d8b6026bbc9ffa48c
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten] allocator: system
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten] modules: none
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten] build environment:
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten]     distarch: x86_64
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten]     target_arch: x86_64
    2019-10-08T17:02:44.209+0800 I CONTROL  [initandlisten] options: {}
    2019-10-08T17:02:44.211+0800 I STORAGE  [initandlisten] exception in initAndListen: NonExistentPath: Data directory /data/db not found., terminating
    2019-10-08T17:02:44.211+0800 I NETWORK  [initandlisten] shutdown: going to close listening sockets...
    2019-10-08T17:02:44.211+0800 I NETWORK  [initandlisten] removing socket file: /tmp/mongodb-27017.sock
    2019-10-08T17:02:44.211+0800 I CONTROL  [initandlisten] now exiting
    2019-10-08T17:02:44.211+0800 I CONTROL  [initandlisten] shutting down with code:100
    ➜  /Users/william &gt; 

I tried to install MongoDB with `brew`:

    brew install mongodb

    ➜  /Users/william &gt; brew install mongodb
    Updating Homebrew...
    Error: mongodb: unknown version :mountain_lion

Any help?

MongoDB can&#39;t find data directory after upgrading to Mac OS 10.15 (Catalina)

I am trying to run `composer update` and I get the following errors:

    Problem 1
        - The requested PHP extension ext-zip * is missing from your system. Install or enable PHP&#39;s zip extension.
      Problem 2
        - maatwebsite/excel 3.1.10 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.11 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.12 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.13 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.14 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.15 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.16 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.17 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.7 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.8 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.9 requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.x-dev requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.2.x-dev requires phpoffice/phpspreadsheet ^1.6 -&gt; satisfiable by phpoffice/phpspreadsheet[1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.0 requires phpoffice/phpspreadsheet ^1.4 -&gt; satisfiable by phpoffice/phpspreadsheet[1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.1 requires phpoffice/phpspreadsheet ^1.4 -&gt; satisfiable by phpoffice/phpspreadsheet[1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.2 requires phpoffice/phpspreadsheet ^1.4 -&gt; satisfiable by phpoffice/phpspreadsheet[1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.3 requires phpoffice/phpspreadsheet ^1.4 -&gt; satisfiable by phpoffice/phpspreadsheet[1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.4 requires phpoffice/phpspreadsheet ^1.4 -&gt; satisfiable by phpoffice/phpspreadsheet[1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.5 requires phpoffice/phpspreadsheet ^1.4 -&gt; satisfiable by phpoffice/phpspreadsheet[1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - maatwebsite/excel 3.1.6 requires phpoffice/phpspreadsheet ^1.4 -&gt; satisfiable by phpoffice/phpspreadsheet[1.4.0, 1.4.1, 1.5.0, 1.5.1, 1.5.2, 1.6.0, 1.7.0, 1.8.0, 1.8.1, 1.8.2, 1.9.0].
        - phpoffice/phpspreadsheet 1.9.0 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.8.2 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.8.1 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.8.0 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.7.0 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.6.0 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.5.2 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.5.1 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.5.0 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.4.1 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - phpoffice/phpspreadsheet 1.4.0 requires ext-zip * -&gt; the requested PHP extension zip is missing from your system.
        - Installation request for maatwebsite/excel ^3.1.0 -&gt; satisfiable by maatwebsite/excel[3.1.0, 3.1.1, 3.1.10, 3.1.11, 3.1.12, 3.1.13, 3.1.14, 3.1.15, 3.1.16, 3.1.17, 3.1.2, 3.1.3, 3.1.4, 3.1.5, 3.1.6, 3.1.7, 3.1.8, 3.1.9, 3.1.x-dev, 3.2.x-dev].

when running `composer update`

Overnight I have made the mistake of my life and allowed my Mac to automatically update the OS, so I am in macOS Catalina now.

I have tried adding

     &quot;require&quot;: {
        &quot;ext-zip&quot;: &quot;*&quot;,
     }

to my composer.json..but its not downloading that extension.

install ext-zip for Mac

Recently I updated Mac OS to latest Catalina and my terminal which is using zsh now start showing me following error:

    zsh: command not found: flutter

It was working fine before update. 



MacOS gives zsh: command not found: flutter after updating path according to Flutter Official Docs

I have downloaded Visual Studio Code for the first time but I keep getting message below:

![apple error message when clicking on VSC app][1]

  [1]: https://i.stack.imgur.com/JYhkw.png

 &gt; &quot;Visual Studio Code&quot; can&#39;t be opened because Apple cannot check it for malicious software. 
 &gt;
 &gt; This software needs to be updated. Contact the developer for more information.

My MacBook is up to date, and I even updated the latest version of VSC on their website (September 2019 (version 1.39); there is none for October) but it still gave me the same message.

Looking into their FAQ, I read about reinstalling VS Code. I did that but it still doesn&#39;t work.

Visual Studio Code can&#39;t be opened because &quot;Apple cannot check it for malicious software&quot;

After an automatic update of [macOS v10.15][1] (Catalina), I am unable to open Xcode. Xcode prompts me to install additional components but the installation fails because of MobileDevice.pkg (Applications/Xcode.app/Contents/Resources/Packages)

I have found multiple answers on how to locate MobileDevice.pkg and that I should try to install it directly, but when I try to do this the installation fails too. I have also tried updating Xcode from [App Store][2], but the update failed when it was nearly finished.

Has anyone experienced the same behaviour? Should I reset the Mac to default and install [macOS v10.13][3] (High Sierra) or Catalina from scratch or it is a problem of Xcode and re-install would do the job?

I have found a discussion [here][4] that was posted today and is probably regarding the same issue and it seems like many people are dealing with it, too.

&lt;!-- language-all: lang-python --&gt; 

The log:

    *2019-10-25 01:03:34+02 Vendula-MacBook-Pro Xcode[1567]: Package: PKLeopardPackage 
    &lt;id=com.apple.pkg.MobileDevice, version=4.0.0.0.1.1567124787, url=file:///Applications/Xcode.app/Contents/Resources/Packages/MobileDevice.pkg&gt; 
    Failed to verify with error: Error Domain=PKInstallErrorDomain Code=102 
    &quot;The package “MobileDevice.pkg” is untrusted.&quot; 
    UserInfo={
      NSLocalizedDescription=The package “MobileDevice.pkg” is untrusted., 
      NSURL=MobileDevice.pkg -- file:///Applications/Xcode.app/Contents/Resources/Packages/, 
      PKInstallPackageIdentifier=com.apple.pkg.MobileDevice, 
      NSUnderlyingError=0x7fabf6626d00 
      {
        Error Domain=NSOSStatusErrorDomain 
        Code=-2147409654 &quot;CSSMERR_TP_CERT_EXPIRED&quot; 
        UserInfo={
          SecTrustResult=5, 
          PKTrustLevel=PKTrustLevelExpiredCertificate,   
          NSLocalizedFailureReason=CSSMERR_TP_CERT_EXPIRED
        }
      }
    }*

  [1]: https://en.wikipedia.org/wiki/MacOS_Catalina
  [2]: https://en.wikipedia.org/wiki/App_Store_(macOS)
  [3]: https://en.wikipedia.org/wiki/MacOS_High_Sierra
  [4]: https://discussions.apple.com/thread/250782804


MobileDevice.pkg untrusted, cannot open Xcode after OS X update

I get the following error messages when I open my terminal, Hyper: 

```
[oh-my-zsh] Insecure completion-dependent directories detected:
drwxrwxr-x  7 dwaynethe2nd  admin  224 Apr 25 15:00 /usr/local/share/zsh
drwxrwxr-x  4 dwaynethe2nd  admin  128 Apr 25 14:53 /usr/local/share/zsh/site-functions
```

Zsh detects insecure completion-dependent directories

I am using apple M1 MacBook pro.

When I installed oh my zsh. When I added`export PATH=&quot;/opt/homebrew/bin:$PATH&quot;` to my ~/.zshrc file. This error was shown in my terminal:

```
joe :: share/zsh/site-functions &#187; source ~/.zshrc
compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew
compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew_cask
```

However, I checked and found that these two files do exsist.
Can someone tell me that the problem is?

This is my ~/.zshrc file:

```
Last login: Sat Jan 16 14:53:34 on console
compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew
compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew_cask
[oh-my-zsh] Random theme &#39;jnrowe&#39; loaded
Ξ ~ → cd ~
Ξ ~ → source .zshrc

compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew
compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew_cask
# export MANPATH=&quot;/usr/local/man:$MANPATH&quot;
[oh-my-zsh] Random theme &#39;cypher&#39; loaded
joe :: ~ &#187; chmod 755 /usr/local/share/zsh
chmod 755 /usr/local/share/zsh/site-functions

joe :: ~ &#187; sudo chmod 755 /usr/local/share/zsh
Password:
joe :: ~ &#187; sudo chmod 755 /usr/local/share/zsh/site-functions
joe :: ~ &#187; ls
#ZSH_DISABLE_COMPFIX=true

# If you come from bash you might have to change your $PATH.
# export PATH=$HOME/bin:/usr/local/bin:$PATH

#Homebrew
export PATH=&quot;/opt/homebrew/bin:$PATH&quot;
export PATH=&quot;/opt/homebrew/sbin:$PATH&quot;
#Homebrew END

#Wget
export LDFLAGS=&quot;-L/opt/homebrew/opt/openssl@1.1/lib&quot;
export CPPFLAGS=&quot;-I/opt/homebrew/opt/openssl@1.1/include&quot;
#Wget END

 #Path to your oh-my-zsh installation.
export ZSH=&quot;/Users/caizhuoyue/.oh-my-zsh&quot;

# Set name of the theme to load --- if set to &quot;random&quot;, it will
# load a random theme each time oh-my-zsh is loaded, in which case,
# to know which specific one was loaded, run: echo $RANDOM_THEME
# See https://github.com/ohmyzsh/ohmyzsh/wiki/Themes
ZSH_THEME=&quot;random&quot;

&quot;~/.zshrc&quot; 114L, 3999C






zsh problem: compinit:503: no such file or directory: /usr/local/share/zsh/site-functions/_brew

Trying to update from Xcode 11 GM to 11.1 always fail.

I tried moving /Applications/Xcode.app first... nothing works

This is my commerce log:

&gt;2019-10-08 12:29:08+01 leviathan installd[556]: PackageKit: Install Failed: Error Domain=PKInstallErrorDomain Code=501 &quot;The package is attempting to install content to the system volume.&quot; UserInfo={NSLocalizedDescription=The package is attempting to install content to the system volume.} {

Can&#39;t update Xcode 11

I was using the latest version of `Android Studio IDE` for creating `flutter` apps. But when I upgraded from Mojave to Catalina and tried to open my `flutter` code on IDE it gave me an error saying: 

&gt; Dart can not be opened because the Developer can not be verified

What is the reason behind the error and how can I solve the issue?

Do I have to install flutter and relative development tools from scratch again or is there any other way to resolve the issue?



[![enter image description here][1]][1]


  [1]: https://i.stack.imgur.com/xhHGY.png

Flutter App Running Error: Dart can not be opened, Developer can not be verified after upgrading to Catalina

After upgrading to Catalina from Mojave, Setuping: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk in the env.

I&#39;m unable to compile a program that use `&lt;cmath&gt;` header.


I tried changing CFLAGS, CCFLAGS, CXXFLAGS to point to the MacOSSDK Location that change nothing

```
Scanning dependencies of target OgreMain
/Applications/Xcode.app/Contents/Developer/usr/bin/make -f OgreMain/CMakeFiles/OgreMain.dir/build.make OgreMain/CMakeFiles/OgreMain.dir/build
[  0%] Building CXX object OgreMain/CMakeFiles/OgreMain.dir/src/OgreASTCCodec.cpp.o
cd /Users/roman/Downloads/ogre-1.12.2/build/OgreMain &amp;&amp; /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/c++  -DOgreMain_EXPORTS -D__ASSERT_MACROS_DEFINE_VERSIONS_WITHOUT_UNDERSCORES=0 -I/Users/roman/Downloads/ogre-1.12.2/OgreMain/src/OSX -I/Users/roman/Downloads/ogre-1.12.2/OgreMain/include/Threading -I/Users/roman/Downloads/ogre-1.12.2/OgreMain/src -I/Users/roman/Downloads/ogre-1.12.2/build/Dependencies/include -I/Users/roman/Downloads/ogre-1.12.2/OgreMain/include -I/Users/roman/Downloads/ogre-1.12.2/build/include -I/Users/roman/Downloads/ogre-1.12.2/OgreMain -isystem /usr/local/include  -Wall -Winit-self -Wcast-qual -Wwrite-strings -Wextra -Wundef -Wmissing-declarations -Wno-unused-parameter -Wshadow -Wno-missing-field-initializers -Wno-long-long -Wno-inconsistent-missing-override  -msse -O3 -DNDEBUG -arch x86_64 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk -fPIC -fvisibility=hidden -fvisibility-inlines-hidden   -std=c++11 -o CMakeFiles/OgreMain.dir/src/OgreASTCCodec.cpp.o -c /Users/roman/Downloads/ogre-1.12.2/OgreMain/src/OgreASTCCodec.cpp
In file included from /Users/roman/Downloads/ogre-1.12.2/OgreMain/src/OgreASTCCodec.cpp:29:
In file included from /Users/roman/Downloads/ogre-1.12.2/OgreMain/src/OgreStableHeaders.h:40:
In file included from /Users/roman/Downloads/ogre-1.12.2/OgreMain/include/OgrePrerequisites.h:309:
In file included from /Users/roman/Downloads/ogre-1.12.2/OgreMain/include/OgreStdHeaders.h:10:
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:314:9: error: no member named &#39;signbit&#39; in the global namespace
using ::signbit;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:315:9: error: no member named &#39;fpclassify&#39; in the global namespace
using ::fpclassify;
      ~~^
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath:316:9: error: no member named &#39;isfinite&#39; in the global namespace; did you mean &#39;finite&#39;?
using ::isfinite;
```

for example the macro: `isless` is present in the global namespace and on my computer:

```
➜ cat math.h | grep &quot;isless&quot;

#define isless(x, y) __builtin_isless((x),(y))
#define islessequal(x, y) __builtin_islessequal((x),(y))
#define islessgreater(x, y) __builtin_islessgreater((x),(y))
➜  pwd
/usr/local/include
➜
```

Even the cmath header include it:

```
➜ cat /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/cmath | grep &quot;math.h&quot;
#include &lt;math.h&gt;
```

And my command line have the option `-isystem /usr/local/include`

This should work...


Content Type	Original Author	Original Content on Stackoverflow
Question	user6269864	View Question on Stackoverflow
Solution 1 - Bash	naydichev	View Answer on Stackoverflow

Git doesn't work on MacOS Catalina: "xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing"

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