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Xcode 7 fails to open on my Mac running OS X 10.10.5. A dialog box opens saying "Loading a plug-in failed". Starting Xcode from the command line outputs the following:

2015-09-20 23:39:36.616 Xcode[1511:58710] [MT] DVTPlugInLoading: Failed to load code for plug-in com.apple.dt.IDE.IDEiOSSupportCore (/Applications/Xcode.app/Contents/PlugIns/IDEiOSSupportCore.ideplugin), error = Error Domain=NSCocoaErrorDomain Code=3587 "The bundle “IDEiOSSupportCore” couldn’t be loaded because it is damaged or missing necessary resources." (dlopen_preflight(/Applications/Xcode.app/Contents/PlugIns/IDEiOSSupportCore.ideplugin/Contents/MacOS/IDEiOSSupportCore): Library not loaded: /System/Library/PrivateFrameworks/MobileDevice.framework/Versions/A/MobileDevice

Paul R
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hanspeide
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5 Answers5

72

Run xcodebuild -runFirstLaunch and it configures your env.

oli vettel
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  • Thanks for this, @oli-vettel! I was getting this error output to terminal with each new session. Output from this command should be: 1%.........20.........40.........60.........80.........Install Succeeded then error goes away. – Rob Sep 23 '22 at 20:43
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    @oli Thank a lot. This helped. Could you explain what was happening before the error? – PAUL JOY Sep 26 '22 at 10:58
  • I was having the same problems when trying to start UE5. I would get to 0% on the initializing and then this same error would pop up. I ran this and after a slow startup (MacOS reindexed the files, etc.) everything seems to be running as I expect. I'm with @PAULJOY that it would be nice to know what caused this but in my opinion this should be marked as the best answer. – probie Sep 27 '22 at 13:58
7

Got into kind of similar error I think

xcodebuild[3855:37375] [MT] DVTPlugInLoading: Failed to load code for plug-in com.apple.dt.IDESimulatorAvailability

Re-install Xcode solved the issue.

Tung Dang
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    worked for me, but I also had to launch Xcode once after re-installing (which then prompted it to install some MacOS and IOS components.) w/o this step I had the same errors. – Sol Arnu Sep 14 '22 at 15:01
3

Reinstalling iTunes fixed this problem. Download the latest iTunes version, install it, and Xcode should open as expected.

hanspeide
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3

in my case, reinstalling Xcode solved the problem.

mjkim
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0

Ensure x-code is fully installed then open to confirm ( you dont have to create a project) you may or may not need to restart you machine, but just do it

Jon-ElCapitan
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