Final Cut Pro version 10.6 extremely slow!!!

I installed the 10.6 FCPX update on my 27" iMac (late 2015) and my editing has been extremely slow ever since. If I just add one transition between two clips, I have to wait a minute or two (with the rotating beachball) before I can do anything else.


I also tried it on my MacBook Pro (16" 2019) and it acts the same way. Very annoying and counter productive.


I also just updated both machines with the macOS Monterey version 12.0.1 iOS, however I was having the problems before I did that.


Is anyone else having this issue? Any suggestions?

iMac Line (2012 and Later)

Posted on Oct 29, 2021 12:38 PM

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Posted on Nov 8, 2021 5:25 PM

UPDATE: Yes, Terry, rolling back to FCPX 10.5.4 is the best advice. After I did that (and luckily my most critical Library had not been updated to 10.6 yet), everything worked as fine as before, even with it running on Monterey 12.0.1. So it looks like the issue is with FCPX 10.6 and not Monterey. But as I said before, it could be a problematic combination with both of those in play at the same time.


Is anyone from Apple Engineering listening in?


Friendly obvious advice: please make sure you backup to Time Machine regularly and before any updates — it's a life saver, especially in reinstalling an earlier version of FCPX. Also, save a copy of your Library in the current FCPX version before updating to a newer version. Once the Library is updated, there's no going back to an earlier version unless you have a backup Library from that version.


Good luck to everyone here in trying to work around this! "Frustrating" hardly begins to describe it.


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Nov 10, 2021 6:53 AM in response to terryb

To all of us who have old ProMac 2015 models with only 2G of video memory and the FCP crash problem, Apple states that the newest version of FCP requires a MINIMUM of 4G but recommends higher than that for proper functionality. In short, the latest version doesn't run well on 2015 models. I have ordered the new mega powerful machine. Not to wax tech philosophical, but FCP doesn't run at all on the first Mac ever made either :-) We just need to realize that at some point we need to upgrade our machines. That's life. My original Mac is in the attic, my 2015 Pro to join it soon. Otherwise, your only option, as has been pointed out numerous times in this thread, is to downgrade to the previous version. You will shut out of any future FCP upgrades (which are automatic) if you don't.

Nov 10, 2021 6:45 PM in response to Currawong

Yes, absolutely correct, Currawong! That's why I posted this earlier:


Please make sure you backup to Time Machine regularly and before any updates — it's a life saver, especially in reinstalling an earlier version of FCPX. Also, save a copy of your Library in the current FCPX version before updating to a newer version. Once the Library is updated, there's no going back to an earlier version unless you have a backup Library from that version.


terryb had also posted:


By default, FCP backs up libraries (no media, just the database) inside ~/Movies/Final Cut Backups/ every 15 minutes, so you could've opened a pre-10.6 version of your library in a worst-case scenario.


With all that can happen with an update, we need to be wise and vigilant in how we backup and restore! : )


Thanks, Everyone, for sharing advice and best practices. Now let's hope Apple is working on a fix.

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Final Cut Pro version 10.6 extremely slow!!!

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