iMovie vs Monterey - major problems

iMovie does not work if you upgrade to Monterey. Be forewarned! I opened a ticket and it is a known problem. Ugh! Must wait for new update either Monterey or iMovie app. Please Apple, you're better than this.

Posted on Oct 30, 2021 8:32 AM

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Posted on Nov 10, 2021 4:59 AM

My iMovie library would not open as well. I reset my preferences and then reopened iMovie. A status bar appeared saying it was backing up library. It finally opened after about 1/2 hour. I have a 2.2TB library.


Reset iMovie

  1. Quit iMovie if it's open.
  2. Hold down the Option and Command keys on your keyboard, and then reopen iMovie.
  3. In the window that appears, click Delete Preferences.

iMovie will reset your preferences and open with default settings.

42 replies

Nov 4, 2021 5:58 PM in response to Rich839

I own a Macbook Pro 2019. I had no issues with loading iMovie for about 3 days after I upgraded to Monterey. But when I was saving my 1 and 1/2 minute video project today, it was just loading endlessly. I forced-quit it, and reopen, but it was just showing an indication "loading imovie library." I tried rebooting, and it didn't solve the issue. Please resolve asap.

Nov 10, 2021 7:23 AM in response to gtobeck

I did that (deleted preferences) and was told it would not delete my projects. Nope!!! All my previous projects are GONE!!! BE CAREFUL if you do this method, which DID NOT help the iMovie situation. Thankfully, I have my projects backed up on an exterior hard drive. WHERE is Apple on this? I love Apple, BUT this is testing my patience.


I usually wait to install their new OS, but Big Sur became corrupted so I downloaded Monterey right away. BIG MISTAKE!!! COME ON APPLE!!!! THIS IS COSTING US TIME AND MONEY!!!!!

Nov 12, 2021 12:18 PM in response to FlorbeijaMIA

Yep, I have this too. Painfully having to open a 450gb Library, and then attempted to move some important stuff to a new library so it’s “quicker” to work with.


It worked initially after installing Monterey, and then just went crazy, hanging for long periods on opening and validating libraries. I occasionally get a long hang time when adding a marker too. 😬


Hope they release an update soon!

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iMovie vs Monterey - major problems

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