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This is pretty frustrating. Last week, without updating or changing any settings, if I option-click on a file in the sidebar or in search, it will no longer open that file in a new assistant editor to the right of my current file.

I also can't cmd-option-control-T to open up an assistant editor either.

I just updated to Xcode 12.5.1, I restarted, no luck.

Anyone know how to fix this?

Thanks

Edit: Other projects in Xcode show assistant editor, it's just this one project.

Zack Shapiro
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1 Answers1

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I faced a similar problem. Solved by following these steps

  1. Clean the Build: Menu Bar → Product → Clean
  2. Clean the Build Folder: Menu Bar → Product → Hold Option Key → Clean build Folder
  3. Delete Xcode Preferences: Run in terminal, defaults delete com.apple.dt.Xcode

Last Resort: Run XCode fix script by Mark Rickert

Let me know if you have any questions.

minchaej
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