UE 4.12 Editor crashes on 10.11.6

Development Platform & Builds
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5

If your project opens in UE4.10 and is having issues in the UE4.12 version, I would:

  1. Make a backup of your 4.12versions and remove the original from your Unreal Projects folder
  2. (Either) Open UE4.12 and choose to open a copy of your 4.10 project
  3. (Or…) Create a new blank project in UE 4.12 then migrate the assets from your UE4.10 project.

*I’d suggest right clicking on the Contents folder and run “Fix up redirectors in folders” in the original UE4.10 project before trying these steps.

Lastly, please send the project file from the version of your project that is crashing:

(Hidden Folder) In Finder, Go>GoTo> ~/Library/Logs/Unreal Engine/ProjectNameEditor/)