Hello BenB, and welcome to the Apple Support Community.
Since the issue has persisted across Final Cut Pro 12.1 and 12.3, and you’ve already deleted preferences and reinstalled Final Cut Pro, this doesn’t appear to be caused by a corrupted installation.
If the same export destinations are recreated every time Final Cut Pro launches, it’s possible that:
- A third-party Share Destination or workflow extension is reinstalling its destination automatically.
- Final Cut Pro doesn’t have permission to save changes to its preferences or configuration files.
- A user-specific configuration is being restored at launch.
I’d suggest trying the following:
- Create a new macOS user account, launch Final Cut Pro there, and see if the same destinations reappear.
- Temporarily disable or uninstall any third-party Final Cut Pro workflow extensions or export utilities, then test again.
- Verify that Final Cut Pro has permission to access your user folders and that your startup disk isn’t reporting file system issues.
If the behavior occurs in a new macOS user account as well, it may indicate a bug in Final Cut Pro, and I recommend submitting feedback directly to Apple.
Helpful links:
Final Cut Pro User Guide for Mac - Apple Support
Feedback - Final Cut Pro - Apple
Could you let us know whether the unwanted destination is always the same third-party destination, and whether the issue also occurs in a new macOS user account?
That will help determine whether this is user-profile related or an application bug.
Please let us know the outcome.
Your feedback may also help other members of the Apple Support Community experiencing the same behavior.
🙏🏻
Have a great day.
And one more thing…
Never forget to think different.