I found the answer on SASS issues: 
https://github.com/sass/sass/issues/1768

Since `OSX el Capitan` there is a new security function that prevents you from modifying system files called Rootless. So you have 2 options:

- If you install gems on `/usr/local/bin` there will be no problem because rootless doesn&#39;t affect this path.

- **`sudo gem install -n /usr/local/bin GEM_NAME_HERE`**

You are experiencing this issue because of a new security feature called [System Integrity Protection][1]

You can disable SIP by following the process mentioned below: 

 1. Reboot your Mac into Recovery Mode by restarting your computer and
    holding down Command+R until the Apple logo appears on your screen.
 2. Click Utilities &gt; Terminal.
 3. In the Terminal window, type in csrutil disable and press Enter.
 4. Restart your Mac.

  [1]: https://developer.apple.com/library/prerelease/mac/releasenotes/MacOSX/WhatsNewInOSX/Articles/MacOSX10_11.html

I&#39;ve a form which I&#39;m submitting (through GET as it is required this way) to a crm (ViciDial). I can successfully submit the form however if I do that the processing file at crm will just echo a success text and that&#39;s it.

Instead of that text, I want to display a thank-you page on my website, so I decided to use AJAX to submit the form and redirect it to the page I need, however I&#39;m getting this error on my browser:

&gt; Mixed Content: The page at &#39;https://page.com&#39; was loaded over HTTPS,
&gt; but requested an insecure XMLHttpRequest endpoint
&gt; &#39;http://XX.XXX.XX.XXX/vicidial/non_agent_api.php?queries=query=data&#39;.
&gt; This request has been blocked; the content must be served over HTTPS.

This is my AJAX script:

		
```js
&lt;script&gt;
SubmitFormClickToCall = function(){
			
	jQuery.ajax({
		url: &quot;http://XX.XXX.XX.XX/vicidial/non_agent_api.php&quot;,
		data : jQuery(&quot;#form-click-to-call&quot;).serialize(),
		type : &quot;GET&quot;,
		processData: false,
		contentType: false,
		success: function(data){
		    window.location.href = &quot;https://www.example.com/thank-you&quot;;
		}
	});
}
&lt;/script&gt;
```

Just setting https in the URL won&#39;t work, is there any way in which I can submit the data via GET and redirect the user to my thankyou page?

============================
============================

Problem here was mixed content, this means that I loaded a page through HTTPS and was trying to hit via AJAX an API that was in HTTP. But the browser wont allow us to just do that. 

So if you can&#39;t set the API to be HTTPS (this was my case) we can still approach this in a different way.

The Main Problem was not the mixed content issue it was that I wanted to submit data to an API and redirect the users to a fancy thank you page. Instead of using AJAX, i made a php file that receives the data sends it using curl to the API (as this is being done server side there is no mixed content issue) and redirects my happy user to a fancy thank you page.

&quot;Mixed content blocked&quot; when running an HTTP AJAX operation in an HTTPS page

I&#39;m using Retrofit to access a RESTful api. The base url is:

&gt; http://api.example.com/service

This is the code for the interface:

    public interface ExampleService {
        @Headers(&quot;Accept: Application/JSON&quot;)
        @POST(&quot;/album/featured-albums&quot;)
        Call&lt;List&lt;Album&gt;&gt; listFeaturedAlbums();
    }

and this is how I send request and receive the responce:

    new AsyncTask&lt;Void, Void, Response&lt;List&lt;Album&gt;&gt;&gt;() {

            @Override
            protected Response&lt;List&lt;Album&gt;&gt; doInBackground(Void... params) {
                Retrofit retrofit = new Retrofit.Builder()
                        .baseUrl(&quot;http://api.example.com/service&quot;)
                        .addConverterFactory(GsonConverterFactory.create())
                        .build();

                ExampleService service = retrofit.create(ExampleService.class);

                try {
                    return service.listFeaturedAlbums().execute();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                return null;
            }

            @Override
            protected void onPostExecute(Response&lt;List&lt;Album&gt;&gt; listCall) {
                Log.v(&quot;Example&quot;, listCall.raw().toString());
            }
        }.execute();

the log that I get is the weird thing:

&gt; V/Example﹕ Response{protocol=http/1.1, code=404, message=Not Found, url=http://api.example.com/album/featured-albums}

What&#39;s going on here?

Retrofit 2 removes characters after hostname from base url

I just updated my Mac to OSX 10.11 El Capitan and some gems didn&#39;t remain.

The problem arose when I tried to run installations of different gems... e.g.:

    &gt; sudo gem install compass

Once I execute, I get the error:

    &gt; ERROR:  While executing gem ... (Errno::EPERM) Operation not permitted

This happens with other gems, as well...

I&#39;ve run Homebrew and tried to install Ruby again, but nothing is working.

ERROR: While executing gem ... (Errno::EPERM) Operation not permitted

I just updated my Mac to OSX 10.11 El Capitan and some gems didn't remain.
The problem arose when I tried to run installations of different gems... e.g.:
<pre><code class="hljs language-markdown">> sudo gem install compass
</code></pre>
Once I execute, I get the error:
<pre><code class="hljs language-vbnet">> ERROR: While executing gem ... (Errno::EPERM) Operation not permitted
</code></pre>
This happens with other gems, as well...
I've run Homebrew and tried to install Ruby again, but nothing is working.

I&#39;m looking at &quot;[Install Ruby on Rails &#183; Mac OS X Yosemite][1]&quot;, and in the instructions it says to update your OS which I don&#39;t really want to do because my computer is getting old.

I also found &quot;https://stackoverflow.com/questions/3696564/how-to-update-ruby-to-1-9-x-on-mac&quot;. As far as I can tell, I don&#39;t have RVM and I&#39;m afraid of yet another install, in case my system requirements still aren&#39;t good enough.

Ultimately, I&#39;m trying to update Jekyll, but I need to update my system a little bit first. I need Ruby 1.9.3 or later. Will &quot;How to update Ruby to 1.9.x on Mac?&quot; work? I&#39;m running Ruby 1.8.7 (2012-02-08 patchlevel 358) [universal-darwin10.0]&#39;.  

EDIT: I did end up getting RVM installed. For those who find this page in the future, I ran into these issues/help pages:

- https://stackoverflow.com/questions/27041885/how-to-resolve-gpg-command-not-found-error-during-rvm-installation
- https://stackoverflow.com/questions/19636779/os-x-mavericks-install-rvm-warning `* WARNING: You have &#39;~/.profile&#39; file...`
- https://stackoverflow.com/questions/16427711/rvm-installation-missing-path `* WARNING: Above files contains `PATH=` with no `$PATH` inside`

  [1]: http://railsapps.github.io/installrubyonrails-mac.html

Can I upgrade to the current version of Ruby (2.2.3) on OS X v10.6.8?

The difference between `after_create`, `after_save` and `after_commit` in Rails is that: 

 - `after_save` is invoked when an object is created and updated
 - `after_commit` is called on create, update and destroy. 
 - `after_create` is only called when creating an object

Is this the only difference among those, or are there any other major differences?

Difference between after_create, after_save and after_commit in rails callbacks

I try to clone [this repo][1] and run `bundle install`. The bundle process failed and throw this error:

        ...
        Installing nokogiri 1.6.2.1 with native extensions
        Building nokogiri using packaged libraries.
        
        Gem::Ext::BuildError: ERROR: Failed to build gem native extension.
        
            /Users/zulhilmizainudin/.rvm/rubies/ruby-2.2.0/bin/ruby -r ./siteconf20151130-43880-pntnc6.rb extconf.rb
        Building nokogiri using packaged libraries.
        -----
        libiconv is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
        -----
        *** extconf.rb failed ***
        Could not create Makefile due to some reason, probably lack of necessary
        libraries and/or headers.  Check the mkmf.log file for more details.  You may
        need configuration options.
        
        Provided configuration options:
        	--with-opt-dir
        	--without-opt-dir
        	--with-opt-include
        	--without-opt-include=${opt-dir}/include
        	--with-opt-lib
        	--without-opt-lib=${opt-dir}/lib
        	--with-make-prog
        	--without-make-prog
        	--srcdir=.
        	--curdir
        	--ruby=/Users/zulhilmizainudin/.rvm/rubies/ruby-2.2.0/bin/$(RUBY_BASE_NAME)
        	--help
        	--clean
        	--use-system-libraries
        	--enable-static
        	--disable-static
        	--with-zlib-dir
        	--without-zlib-dir
        	--with-zlib-include
        	--without-zlib-include=${zlib-dir}/include
        	--with-zlib-lib
        	--without-zlib-lib=${zlib-dir}/lib
        	--enable-cross-build
        	--disable-cross-build
        
        extconf failed, exit code 1
        
        Gem files will remain installed in /Users/zulhilmizainudin/.rvm/gems/ruby-2.2.0/gems/nokogiri-1.6.2.1 for inspection.
        Results logged to /Users/zulhilmizainudin/.rvm/gems/ruby-2.2.0/extensions/x86_64-darwin-14/2.2.0-static/nokogiri-1.6.2.1/gem_make.out
        An error occurred while installing nokogiri (1.6.2.1), and Bundler cannot continue.
        Make sure that `gem install nokogiri -v &#39;1.6.2.1&#39;` succeeds before bundling.

Then I try to run this:

    gem install nokogiri -v &#39;1.6.2.1&#39;

And now I get this error:

    Building native extensions.  This could take a while...
    Building nokogiri using packaged libraries.
    ERROR:  Error installing nokogiri:
    	ERROR: Failed to build gem native extension.
    
        /Users/zulhilmizainudin/.rvm/rubies/ruby-2.2.0/bin/ruby -r ./siteconf20151130-43942-1axq4sj.rb extconf.rb
    Building nokogiri using packaged libraries.
    -----
    libiconv is missing.  please visit http://nokogiri.org/tutorials/installing_nokogiri.html for help with installing dependencies.
    -----
    *** extconf.rb failed ***
    Could not create Makefile due to some reason, probably lack of necessary
    libraries and/or headers.  Check the mkmf.log file for more details.  You may
    need configuration options.
    
    Provided configuration options:
    	--with-opt-dir
    	--without-opt-dir
    	--with-opt-include
    	--without-opt-include=${opt-dir}/include
    	--with-opt-lib
    	--without-opt-lib=${opt-dir}/lib
    	--with-make-prog
    	--without-make-prog
    	--srcdir=.
    	--curdir
    	--ruby=/Users/zulhilmizainudin/.rvm/rubies/ruby-2.2.0/bin/$(RUBY_BASE_NAME)
    	--help
    	--clean
    	--use-system-libraries
    	--enable-static
    	--disable-static
    	--with-zlib-dir
    	--without-zlib-dir
    	--with-zlib-include
    	--without-zlib-include=${zlib-dir}/include
    	--with-zlib-lib
    	--without-zlib-lib=${zlib-dir}/lib
    	--enable-cross-build
    	--disable-cross-build
    
    extconf failed, exit code 1
    
    Gem files will remain installed in /Users/zulhilmizainudin/.rvm/gems/ruby-2.2.0/gems/nokogiri-1.6.2.1 for inspection.
    Results logged to /Users/zulhilmizainudin/.rvm/gems/ruby-2.2.0/extensions/x86_64-darwin-14/2.2.0-static/nokogiri-1.6.2.1/gem_make.out

I tried to follow [this answer][2] but I still get the same error above.

I also try to uninstall and install my brew again ([based on this answer][3]) and it&#39;s still same.

Also, I try [this solution][4] but still get the error.

What should I do now to make sure this nokogiri gem installed successfully?

Note: I&#39;m using OSX 10.11.1 El Capitan.


  [1]: https://github.com/crowdint/acts_as_shopping_cart_app
  [2]: https://stackoverflow.com/a/6163052/1577357
  [3]: https://stackoverflow.com/a/22439835/1577357
  [4]: https://github.com/sparklemotion/nokogiri/wiki/Install-libiconv-on-OS-X-with-Homebrew

Error installing nokogiri: Failed to build gem native extension &amp; libiconv is missing (OSX)

Ruby 2.3 introduces a new method on `Array` and `Hash` called `dig`. The examples I&#39;ve seen in blog posts about the new release are contrived and convoluted:

    # Hash#dig
    user = {
      user: {
        address: {
          street1: &#39;123 Main street&#39;
        }
      }
    }

    user.dig(:user, :address, :street1) # =&gt; &#39;123 Main street&#39;

    # Array#dig
    results = [[[1, 2, 3]]]
    results.dig(0, 0, 0) # =&gt; 1

I&#39;m not using triple-nested flat arrays. What&#39;s a realistic example of how this would be useful?

**UPDATE**

It turns out these methods solve one of the most commonly-asked Ruby questions. The questions below have something like 20 duplicates, all of which are solved by using `dig`:

https://stackoverflow.com/questions/4371716/how-to-avoid-nomethoderror-for-missing-elements-in-nested-hashes-without-repeat

https://stackoverflow.com/questions/1820451/ruby-style-how-to-check-whether-a-nested-hash-element-exists

How do I use Array#dig and Hash#dig introduced in Ruby 2.3?

I have installed Rails and Ruby on Windows with railsinstaller. The problem is, when I run the rails command, it gives me: &quot;The system cannot find the path specified.&quot;

I am running windows 7 x64 and Ruby 2.20.

I tried uninstalling Rails and installing it again; that does not help. Ruby commands execute, like `ruby -v`, but `rails -v=` dont work. 


Rails - The system cannot find the path specified

So it looks like the new &#39;System Integrity Protection&#39; [lockdown][1] of /usr (among other directories) makes pear and pecl a non-starter. Has anyone found a workaround short of disabling it? 


  [1]: http://arstechnica.com/apple/2015/09/os-x-10-11-el-capitan-the-ars-technica-review/8/

Installing pecl and pear on OS X 10.11 El Capitan, macOS 10.12 Sierra, macOS 10.13 High Sierra (&lt; 10.13.3)

I just upgraded from Yosemite to El Capitan (and replicated the problem upgrading from El Capitan to Sierra), and when I try to type for example `git status` inside a terminal, I get the following error:

    xcrun: error: invalid active developer path
     (/Library/Developer/CommandLineTools), missing xcrun at:
     /Library/Developer/CommandLineTools/usr/bin/xcrun

I don&#39;t have Xcode installed, never did. 
Anyone have a solution?

Command Line Tools not working - OS X El Capitan, Sierra, High Sierra, Mojave

    pip install m2crypto

Generates the following output:

    building &#39;M2Crypto.__m2crypto&#39; extension
    swigging SWIG/_m2crypto.i to SWIG/_m2crypto_wrap.c
    swig -python -I/System/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -I/usr/include -I/usr/include/openssl -includeall -modern -o SWIG/_m2crypto_wrap.c SWIG/_m2crypto.i
    SWIG/_m2crypto.i:30: Error: Unable to find &#39;openssl/opensslv.h&#39;
    SWIG/_m2crypto.i:33: Error: Unable to find &#39;openssl/safestack.h&#39;
    SWIG/_evp.i:12: Error: Unable to find &#39;openssl/opensslconf.h&#39;
    SWIG/_ec.i:7: Error: Unable to find &#39;openssl/opensslconf.h&#39;
    error: command &#39;swig&#39; failed with exit status 1

I&#39;ve run:

    brew install swig



Trouble installing m2crypto with pip on OS X / macOS

I installed postgres using homebrew.
I would like to locate he files pg_hba.conf and postgresql.conf but I cannot find them.

I followed this :

https://askubuntu.com/questions/256534/how-do-i-find-the-path-to-pg-hba-conf-from-the-shell

and this 

http://www.kelvinwong.ca/tag/pg_hba-conf/

but I still cannot find it.

Cannot find pg_hba.conf and postgreql.conf file on OS X?

I have a mac, when I do:

    python --version 

I got:

    Python 2.7.6

but when I got to:

    /System/Library/Frameworks/Python.framework/Versions/3.3

where is 2.7.6 located ?
any advice what should I do? 

UPDATE:

    $ which -a python python3
    /usr/bin/python
    /usr/local/bin/python3
    
    $ brew list python python3
    Error: No such keg: /usr/local/Cellar/python
    
    $ locate python

    WARNING: The locate database (/var/db/locate.database) does not exist.
    To create the database, run the following command:

  

    sudo launchctl load -w /System/Library/LaunchDaemons/com.apple.locate.plist

    Please be aware that the database can take some time to generate; once
    the database has been created, this message will no longer appear.

in PyCharm editor, the default settings interpreter shows:

![](https://s12.postimg.cc/w7o94dry5/Screen_Shot_2015_10_16_at_2_56_08_PM.png)

What version of Python is on my Mac?

When I execute on osx El Capitan:

    sudo gem update --system  

I got the error:

    Updating rubygems-update
    ERROR:  While executing gem ... (Errno::EPERM)
        Operation not permitted - /usr/bin/update_rubygems

Operation not permitted - /usr/bin/update_rubygems

I&#39;m attempting to install `jekyll` and I&#39;ve encountered an error. I&#39;m running Mac OS X 10.11.4 (El Capitan).

    $gem install jekyll
    ERROR : While executing gem ... (Gem::Exception)
            Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources
    $gem source -l
    https://ruby.taobao.org
    $which openssl
    /usr/local/bin/openssl

I welcome your suggestions how to resolve this error.

Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources

I have ruby installed on my ubuntu 16.04.

    $which ruby  
    
    /usr/bin/ruby

    $ruby -v 
    
    ruby 2.3.0p0 (2015-12-25) [x86_64-linux-gnu]

    $gem install bundler 
    
    ERROR:  While executing gem ... (Gem::FilePermissionError)
        You don&#39;t have write permissions for the /var/lib/gems/2.3.0 directory.

You don&#39;t have write permissions for the /var/lib/gems/2.3.0 directory

I am getting this error while running server, how do I fix this?

[![enter image description here][1]][1]


  [1]: http://i.stack.imgur.com/ZuBkB.png

How to fix &quot;Your Ruby version is 2.3.0, but your Gemfile specified 2.2.5&quot; while server starting

On both my work and home computers, I recently upgraded Ruby to 2.3.1, using `ruby-install`. I use `chruby` as my Ruby switcher.

I started seeing this warning in my terminal:

    Ignoring bcrypt-3.1.11 because its extensions are not built.  Try: gem pristine bcrypt --version 3.1.11
    Ignoring bcrypt-3.1.10 because its extensions are not built.  Try: gem pristine bcrypt --version 3.1.10
    Ignoring binding_of_caller-0.7.2 because its extensions are not built.  Try: gem pristine binding_of_caller --version 0.7.2
    Ignoring byebug-9.0.5 because its extensions are not built.  Try: gem pristine byebug --version 9.0.5
    Ignoring byebug-5.0.0 because its extensions are not built.  Try: gem pristine byebug --version 5.0.0
    Ignoring concurrent-ruby-ext-1.0.2 because its extensions are not built.  Try: gem pristine concurrent-ruby-ext --version 1.0.2
    Ignoring debug_inspector-0.0.2 because its extensions are not built.  Try: gem pristine debug_inspector --version 0.0.2

On my work, computer, the list was much longer, but easy to resolve. When I tried the suggested `gem pristine GEM`, it told me it couldn&#39;t find the gem, so I ran `gem install GEM`, and that solved it.

At home, nothing is working.

Things I have tried, from common sense and various other Stack questions:

- `gem pristine GEM`
- `gem pristine --all`
- uninstalling and reinstalling the gem
- `gem update`
- `gem update --system`
- `bundle update`
- uninstalling and reinstalling `bundler`
- uninstalling and reinstalling `rails` (Though, it&#39;s not a Rails specific problem.)
- deleting `~/.bundle/`
- opening `XCode` and letting it install some extensions (It did need to do it, but it didn&#39;t fix anything.)
- running `brew doctor` and solving all the minor issues, then `brew update` and `brew upgrade`
- `gem install curb` (I can&#39;t imagine what this gem has to do with this issue, but two different people listed it as the last step of their fix to the same warning.)

Ignoring GEM because its extensions are not built

When I run:

    sudo pip install ipython

I get the following error

&gt; OSError: [Errno: 1] Operation not permitted: &#39;/System/Library/Frameworks/Python.framework/Versions/2.7/share&#39;

The last command executed tries to create the directory given above.

Also, the following command fails to install iPython without providing any errors.

    sudo pip install --user python

(I am on Mac OS X El Capitan in case other folks on this OS see the same issue.)

OSX El Capitan: sudo pip install OSError: [Errno: 1] Operation not permitted

I&#39;ve upgraded to El Capitan and since then I can&#39;t update my pods.

    $ pod update
    -bash: pod: command not found

So I&#39;ve tried to reinstall CocoaPods and got this:

    $ sudo gem install cocoapods
    ERROR:  While executing gem ... (Errno::EPERM)
        Operation not permitted - /usr/bin/xcodeproj

I am the administrator on this computer. Why is this happening? 

Cocoa Pods not updating pods on El Capitan

I have erased and installed `OSX 10.11 El Capitan` and I have been following through [this tutorial][1] to get `MySQL` up and running on the new OS X. The first step was to download [MySQL For Mac OS X 10.9 (x86, 64-bit), DMG Archive][2] (works on 10.11, they recommended in the tutorial). While I were finishing installing the MySQL, I got the message saying that :

    2015-10-25T02:10:54.549219Z 1 [Note] A temporary password is generated for root@localhost: R&gt;gFySuiu23U
    
    If you lose this password, please consult the section How to Reset the Root Password in the MySQL reference manual.

That was weird, I have never seen that kind of message. After that, I started MySQL via the Preference Pane and then use `/usr/local/mysql/bin/mysql -v` command on the terminal for another step. I got an error message saying that : 

`ERROR 1045 (28000): Access denied for user &#39;cheetah&#39;@&#39;localhost&#39; (using password: NO)`

I have also tried to access database through `Sequel Pro` using root as username and blank password, I got access denied message saying that : 

    Unable to connect to host 127.0.0.1 because access was denied.
    
    Double-check your username and password and ensure that access from your current location is permitted.
    
    MySQL said: Access denied for user &#39;root&#39;@&#39;localhost&#39; (using password: NO)

Okay, I also tried this again using root as a username but &#39;R&gt;gFySuiu23U&#39;  as a password (which was generated from MySQL). I got connection failed message saying that :

    Unable to connect to host 127.0.0.1, or the request timed out.
    
    Be sure that the address is correct and that you have the necessary privileges, or try increasing the connection timeout (currently 10 seconds).
    
    MySQL said: Your password has expired. To log in you must change it using a client that supports expired passwords.

How could I solve this problem? I remember that MySQL has never got automatically generated a temporary password like this, hasn&#39;t it ?


  [1]: http://coolestguidesontheplanet.com/get-apache-mysql-php-and-phpmyadmin-working-on-osx-10-11-el-capitan/
  [2]: http://dev.mysql.com/downloads/mysql/

Content Type	Original Author	Original Content on Stackoverflow
Question	Roy Calderon	View Question on Stackoverflow
Solution 1 - Ruby	Roy Calderon	View Answer on Stackoverflow
Solution 2 - Ruby	Abid Ur Rehman	View Answer on Stackoverflow

ERROR: While executing gem ... (Errno::EPERM) Operation not permitted

Ruby Problem Overview

Ruby Solutions

Solution 1 - Ruby

Solution 2 - Ruby

Retrofit 2 removes characters after hostname from base url

"Mixed content blocked" when running an HTTP AJAX operation in an HTTPS page

Attributions