FCPX slow/hanging up after 10.66 update

Editing hangs up 1-2 seconds on most keystrokes. Anybody else? Fixes? Thanks! OS 12.6.5 MBPro 2019 16", 2.3 GHz 8-Core Intel Core i9.

I have not had any hang ups, but it could be a bottleneck on where you are drawing your file footage from.  It is an external hard drive?  Are you plugged into its fastest port?  Second thing, maybe you have too many other programs open.  I know in Motion, this is a big thing because it is a memory hog.  Try closing all other programs that you are not using. 

Thanks for the advice however I have nothing else open and using same drive same way as usual. Started right after updating FCP. Anyone else have an idea? Really impeding my workflow for broadcast air...

Haven't updated to OS Ventura 13.4, still on Monterey. Maybe that would help?

Check the threads here and Apple Discussions to make sure you won't be affected by the high frame rate XAVC-S problems before updating to 13.4.

It's not just high frame rate XAVC-S, but also all 5.1k 10-bit H264 material at *all* frame rates from the DJI Mavic 3. The HEVC (H265) versions of those are OK. It may also include the Mavic 3 Pro which also can shoot 5k 10-bit H264, but I haven't tested that yet.

Just a small nitpick, but HEVC is h.265.

Redifer wrote:

Just a small nitpick, but HEVC is h.265.

Thank you for that correction; please do not hesitate to mention things like this.

Playback of my Sony FX3 footage (HEVC) is laggy as well when I scroll through the footage although not using more than 10% processor power from internal SSD. But if its THAT bad as you say and you are using an external drive I would first check with blackmagic disk speed. I am often using the same external SSD and sometimes its really slow then connecting USB-C the other way round or to another port of my hub suddenly I have full speed again.

I'm using the same SSD been using for a year, the only change was when I updated FCP to 10.66. I drag a clip and it hangs up for 2-4 seconds.

UPDATE: When I go to a different library, the extreme slowness disappears. ALSO: If I create a new project in the "slow" library and copy and paste a timeline from a "slow" project into this new project, FCPX runs at full speed with no hangups -- even tho that same timeline (the one I copied) hangs up miserably in the "slow" project)! What is going on??

Wondering wrote:

UPDATE: When I go to a different library, the extreme slowness disappears. ALSO: If I create a new project in the "slow" library and copy and paste a timeline from a "slow" project into this new project, FCPX runs at full speed with no hangups -- even tho that same timeline (the one I copied) hangs up miserably in the "slow" project)! What is going on??

Could be some incompatible updates in the FCP codebase, i.e., something isn't being transferred or interpreted properly from "older" versions of Library components.

That's wonderful news if copying the contents from a Project created/used in a previous version of FCP works fine when pasted in a new, empty Project. This may also apply to updated Libraries that exhibit slower performance or responsiveness. Thanks for reporting this.

Well I'm glad that it's not the SSD...but now I have to copy the contents from some 50 projects and media into "new" projects with similar names. Would still like to know the reason and solution. Anyone know the max # of projects allowed in a Library?

Wondering wrote:

Well I'm glad that it's not the SSD...but now I have to copy the contents from some 50 projects and media into "new" projects with similar names. Would still like to know the reason and solution. Anyone know the max # of projects allowed in a Library?

It just may be a change, in part due to iPad integration with FCP desktop.

If you had zipped a copy of 10.6.5 before installing 10.6.6, I'd say go back to it. Besides losing some audio plugins and FCP for iPadOS compatibility, there is nothing really compelling about 10.6.6. Exporting XML files for Projects, Events, and Libraries is always a good idea, as well (a "cuts only" export of a finished Project and an XML of the same are also good safety measures). Copying a Library in the Finder is good move, before a new version of FCP "touches" it.

Reason? Apple won't ever (most likely) give a reason, or even publish much or any info about changes made. Apple is a great case study in corporate arrogance, condescension, and how not to build rapport or goodwill with a customer base (especially for "pro" products).

DaveM wrote:

If you had zipped a copy of 10.6.5 before installing 10.6.6, I'd say go back to it. .

Off topic, but why do people always recommend zipping older versions of Final Cut Pro? Just create a new folder called Old Final Cuts (or whatever) drag the app in there and relabel it as Final Cut Pro 10.6.5 (or whatever). That's what I did and have since reverted back to 10.6.5 because of Apple's dumbing down of the app thanks to the iPad version.

Redifer wrote:

DaveM wrote:

If you had zipped a copy of 10.6.5 before installing 10.6.6, I'd say go back to it. .

Off topic, but why do people always recommend zipping older versions of Final Cut Pro? Just create a new folder called Old Final Cuts (or whatever) drag the app in there and relabel it as Final Cut Pro 10.6.5 (or whatever). That's what I did and have since reverted back to 10.6.5 because of Apple's dumbing down of the app thanks to the iPad version.

It's a safety measure. If that folder is in the Applications folder, any application it contains might be scanned or potentially load background processes, etc., at startup. If the folder is elsewhere, it doesn't matter. Many applications contain various drivers and background processes than can load at startup in their packages.

I have a folder, in which I put the zipped copies of older FCP versions. "Double prophylaxsis" ha, ha, ha... 

Didn't save a copy of 10.6.5...how do I get one?

"You can't purchase an older version. If you have purchased FCP X already, you can open the App Store, click on Purchased, locate FCP X in the list and click Download. You will be offered to download the most recent version that works in your OS.Dec 3, 2019".....but can't find where to get older version.

Wondering wrote:

Didn't save a copy of 10.6.5...how do I get one?

You might be able to ask someone to send, or make available, a copy of 10.6.5. I have no idea if versions downloaded are HW-specific, or not, or if this would work. It _should_ be legal in that your App Store "receipt" is what authorizes you. Never tried it myself...

...and actually, even if I can get a copy of 10.6.5, my libraries are all updated to 10.6.6. How does that work? Will they be "down"dated backwards to 10.6.5?