FCPX - Won't Start - Application Not Responding - Beach Ball

Final Cut Pro X will not start at all. As soon as the application opens it 100% locks with the beach ball spinning (for 30 min.). I've repeatedly forced quit. This did nothing to solve the problem. Then I deleted FCPX and reinstalled - but the application still won't start. What now?


I'm using a 2015 MacBook Pro with Monterey 12.7.6


FCPX is version 10.6.8

MacBook Pro 15″, macOS 12.7

Posted on May 31, 2025 11:37 PM

Reply
21 replies

Jun 1, 2025 4:03 AM in response to silver_mica

Hi (bonjour),


Try to delete FCP preference: hold command and option key and launch Final Cut.

Detailed Steps: 

  1. Quit Final Cut Pro: Ensure the application is completely closed. 
  2. Hold Command and Option: When opening Final Cut Pro, hold down the Command and Option keys simultaneously. 
  3. Delete Preferences: A popup window will appear asking if you want to delete the custom settings. Click "Delete Preferences" to proceed. 
  4. Open Final Cut Pro: The application will launch with its default settings. 
  5. Reopen Libraries: If you had libraries open previously, you might need to reopen them via File > Open Library. 


Jun 1, 2025 9:45 AM in response to Michel Boissonneault

Unfortunately using the above instructions didn't work. After deleting the preferences FCPX opened and hung with a spinning beach ball. The application is not responding. I've never seen Apple this bad. FCPX is 100% unusable. I've at it since last night for hours and hours. FCPX just won't start - hangs when opened. This is horrible.

Jun 1, 2025 12:30 PM in response to Luis Sequeira1

My "system" is not having hangs and crashes. FCPX will not start - that is the symptom. FCPX will run with a small amount of disk space. So that's definitely not the problem here. It's something deep - perhaps a corrupt SSD?


Incidentally last night I had 70GB free. However, I didn't check free space this morning. But, I haven't changed anything either. Free space fluctuation is more if an issue with iCloud. I've got everything on iCloud - free space automatically fluctuates by 10s of GB. At times I'll have over 100GB then all of a sudden I'm low again. iClould should force a minimum free space at all times - preferably something the user chooses. If it were me I'd keep 25% of the drive free at all times (what I did before moving everything to the iCloud).


Unless I have a hardware failure - I bet reinstalling Windows - I mean macOS - will solve the mysterious (maddening) issue.

Jun 1, 2025 12:35 PM in response to Luis Sequeira1

Well, I'm forced to use Chrome for YouTube movies that I've paid for. Safari glitches like a screwed up Windows system when playing YouTube movies. Magically Chrome works fine. I'm not fond of Google either. And, for the record I'm against Chrome. Weirdly, Safari is absolutely fine with normal YouTube videos - such as the news and stuff put out by creators. But, that may be due to the short length of the videos. I'm glad I never threw out my DVDs.

Jun 2, 2025 1:40 AM in response to silver_mica

You may want to try out Brave (based on the same web engine as Chrome, but not using its underhand tactics, and its background processes) or Firefox. Maybe you don't really need Chrome.


The thing is that the keystone processes are known to at times block the system videotoolbox. They can affect other video applications, not just FCP.


You can reinstall the OS if you want to, but it is a nuisance and it is unlikely to help.


Jun 2, 2025 10:24 AM in response to silver_mica

In addition to the always excellent advice from Tom and Luis, are you trying to open a library that references media stored in iCloud Drive? All media must be local on the machine. Check if Desktop & Documents is enabled in iCloud Drive and you have media you're referencing stored in these folders. That can hang up FCP.

Jun 3, 2025 3:21 PM in response to silver_mica

And then FCPX began working - seemingly for no reason.


What I didn't say in this thread is that I had been running Disk Utility. Running Disk Utility was one of the first things I did immediately after finding that reinstalling FCPX didn't solve the problem. At the time Disk Utility was reporting errors of the snapshot; Disk Utility failed to fix those errors. Below is the error I was getting from Disk Utility:


error: Unable to perform deferred repairs without full space verification
error: Try running fsck against the entire APFS container instead of a volume


I continued running Disk Utility repeatedly into the next day. Somewhere in the middle of that chaos FCPX suddenly began working. So I quickly edited a video (yesterday).


I started FCPX today and it opened just fine.


I also ran Disk Utility today and there were no errors.


So, maybe the issue was related to the disk having errors. I don't know.


Whatever the case - I need to upgrade my hardware. I'm pushing my luck running a 2015 MacBook Pro.


Thanks for all the help.

FCPX - Won't Start - Application Not Responding - Beach Ball

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