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iMovie library can't open my libraries after upgrading to Catalina - FFLibraryUpgradeLock problem

I have the problem after upgrading to Catalina that I can't open my libraries (external disc).

1. "You don’t have permission to save the file “FFLibraryUpgradeLock” in the folder “iMovie Library“ / 2. "The library “iMovie Library“ could not be updated because an unexpected error occurred".

How can I solve this?


MacBook Air 11", macOS 10.15

Posted on Mar 28, 2020 11:04 AM

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Question marked as Best reply

Posted on Mar 30, 2020 2:22 AM

So Apple Support found a solution (for me) - hope it can help others :)

Thanks again to Rich for his really kind help!


1. System Preferences

2. Security & Privacy

3. Files and Folders

4. iMovie, "tick" on Removable Volumes and accept "Quit now".

5. Restart Mac


Here are my screen shots for guidance for the different steps.



6 replies
Question marked as Best reply

Mar 30, 2020 2:22 AM in response to Rich839

So Apple Support found a solution (for me) - hope it can help others :)

Thanks again to Rich for his really kind help!


1. System Preferences

2. Security & Privacy

3. Files and Folders

4. iMovie, "tick" on Removable Volumes and accept "Quit now".

5. Restart Mac


Here are my screen shots for guidance for the different steps.



Mar 28, 2020 11:36 AM in response to Ole_Einar

Try doing a control click on your external drive's icon, and then click on Get Info. In the dialogue box that appears, unlock the little lock icon at the bottom, and check the box at the bottom that says "Ignore ownership on this volume." See if that solves it.



If that doesn't cure it, do a control-click/Get Info on your computer's drive and your external drive and on your iMovie Library Icon, and make sure that the permissions match, i.e, all have "Read and Write" permissions.


-- Rich

Mar 28, 2020 3:25 PM in response to Rich839

Thank you so much to take your time! This is so kind, Rich!!!

The "Ignore ownership on this volume" is not shown on my Mac (se attached screen shot). So I have not the possibility to do this. But I think there must be somethings quite similar (?). When I started iMovie after installing the Catalina I remember I had to answer some "yes" or "now". I think this maybe is what went wrong, that I denied some kind of permission to the external drive. So does the screen shot give you another clue to what might be the solution for my problem? Regards Ole


Mar 28, 2020 4:57 PM in response to Ole_Einar

What is “Custom Access” on the Videoarkiv” volume? It should be read/write. Also, what are the permissions on the iMovie library itself, versus the iMovie app? The library shoud be read/right as well.


I think you are at the point where you would benefit from talking with the techs at Apple Support. They are very savvy and have the capability to remotely access your computer, that we can’t do here. Click on the Contact Support item at the upper right hand corner of this forum’s screen. Navigate to a phone number where you can talk to a tech.


The issue you raise has been brought up before. So, if you have time would you post back with your results, as it may help others figure this out.


— Rich





iMovie library can't open my libraries after upgrading to Catalina - FFLibraryUpgradeLock problem

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