Xcode-beta can not be opened while it is being updated
IosXcodeIos Problem Overview
I'm using Xcode beta 8.1 beta 2 for development.
It was working fine for me.
But suddenly, it closed and I tried to open it prompted me this message:
>Xcode-beta can not be opened while it is being updated.
When will it be resolved?
Ios Solutions
Solution 1 - Ios
Open activity monitor (/Applications/Utilities/Activity Monitor.app), switch to the CPU tab and search for storedownloadd. If that process is present and you aren't downloading anything using the Mac App Store, you can kill it.
Solution 2 - Ios
Faced the same issue and here is the solution to open Xcode.
Go to Application folder -> find Xcode -> Right click and select "Show Package Content" -> Go to Content -> MacOS -> Double click Xcode (Unix excecutable file).
It worked for me!
Solution 3 - Ios
tried @Rick's solution didn't work. I ended up restarting my machine which fixed it.
Solution 4 - Ios
Please follow the steps below,
1. Open App Store app in you Mac
2. Select Updates tab
3. Look Xcode is in Pending section
4. Stop (Sometime start Update and then Stop)
You will be able to open the app now onwards.
>Note: That is applicable not only for Xcode but also for any app which is not opening due to updating.
Solution 5 - Ios
Did you update your system to the newest version? If not, please do so. Then try opening XCode. I believe it will work out with this problem. Otherwise, you need to re-install your Xcode.
Solution 6 - Ios
In my case, I noticed that this warning is revealed when there is a continuing install in AppStore (it was itunes for me and Xcode 8.2.1).
Try to cancel download or just wait for it to be complete. Then xcode will again be available to work on.
Solution 7 - Ios
This seems like an AppStore bug.
Check the link for the fix: https://apple.stackexchange.com/questions/126288/xcode-5-1-wont-launch-being-updated-but-already-installed
Solution 8 - Ios
Open Launchpad, scroll to XCode and if it shows the download progress just wait for completion 
Solution 9 - Ios
I had this same problem for a while and the ONLY thing that worked for me was to uninstall XCode and download it again.
Solution 10 - Ios
Hope this helps anyone with the same issue as I had.
As my Mac running out of space, I deleted some Simulators(from ~/Library/Developer/CoreSimulator/Devices/) which I don't need/use. When I tried to start Xcode after cleanup then I got OP's issue.
Able to launch Xcode after restarting the system. So try restarting system first if that doesn't work, try @Sazzad's or accepted answer.