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All iMovie projects gone after Big Sur update

A few days after updating to Big Sur, I am shocked as I opened iMovie. There's nothing in there anymore.


I have looked up the iMovie library in my user folder: family/Movies/iMovie-Mediathek 2021.imovielibrary. The file is only 189 KB in size! When I open it using "Show Package Contents", I can see that there are no projects inside at all.


I found https://discussions.apple.com/thread/8344612 and was able to locate the Library folder at: /Users/family/Library/Containers/com.apple.iMovieApp/Data/Library/Caches/iMovie Backups.localized/iMovie-Mediathek 2021/ - However the only library found is from today and is 189 KB in size as well.


I found another library which is 6 months old (1 March) - probably I did another MacOS upgrade back then at: /Users/family/Library/Containers/com.apple.iMovieApp/Data/Library/Caches/iMovie Backups.localized/iMovie-Mediathek/ - In there are many backups from earlier than March.


When I opened the latest, iMovie would find all projects and all metadata, but all raw media files are missing still!


I would love to know:


  1. What happened to my proper iMovie Library? How come that my MacBook simply overwrites it with a plain empty version?
  2. How can I recover in a way that i get my metadata AND my raw files - just as packaged as they were before this happened?

MacBook Pro

Posted on Aug 24, 2021 2:57 PM

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Posted on Oct 9, 2021 6:55 AM

To state the obvious. . . . you need to search your Mac and the easiest way is as follows:-


  1. In the Apple menu at the top left of the screen select "About This Mac".
  2. Select "Storage" and click the "Manage" button.
  3. Wait a few minutes while your Mac catalogues everything and you will be left with a window like below.
  4. At the left you have a series of headings like "Applications", "Documents" etc. Start by clicking on Documents and then select the "Size" column ensuring that the largest files are at the top.
  5. You should then be able to spot anything big like an iMovie Library.


You can then either double-click it to open it in iMovie or click "Show in Finder" to see where it is residing.










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Question marked as Best reply

Oct 9, 2021 6:55 AM in response to chiccodoro

To state the obvious. . . . you need to search your Mac and the easiest way is as follows:-


  1. In the Apple menu at the top left of the screen select "About This Mac".
  2. Select "Storage" and click the "Manage" button.
  3. Wait a few minutes while your Mac catalogues everything and you will be left with a window like below.
  4. At the left you have a series of headings like "Applications", "Documents" etc. Start by clicking on Documents and then select the "Size" column ensuring that the largest files are at the top.
  5. You should then be able to spot anything big like an iMovie Library.


You can then either double-click it to open it in iMovie or click "Show in Finder" to see where it is residing.










Aug 25, 2021 1:23 PM in response to Rich839

@Rich, thank you for your reply. I have already searched my iMovie folder and there is no other library containing any more data.


Concerning OS upgrades - I am pretty sure that I had a few upgrades of iMovie, iPhoto, etc. in the past already when the OS was upgraded. I cannot remember that I ever upgraded iMovie on its own, but the version did change after former OS updates.


Is there any way I can recover?

Aug 29, 2021 11:34 PM in response to chiccodoro

I think that you might benefit from talking with the techs at Apple Support. They have the capability of remotely accessing your computer that we cannot do here. If you want to go that route click on the Get Support item in the upper right hand corner of this forum’s screen. Navigate to a place where you can enter your phone number.


I had read your post carefully. From the file path that you gave I was not certain that you were going to the correct space.


— Rich

Oct 31, 2021 1:14 PM in response to Ian R. Brown

THANK YOU!!! This helped me find a library from June. (The same thing happened to me...presumably after iOS upgrade, but I hadn't notice because I hadn't looked into iMovie in a while!) It's currently loading into iMovie and I see that at least some stuff is coming back. PHEW. Looks like both the "media" and "projects" tab are populated.

THANKS!!!

All iMovie projects gone after Big Sur update

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