Final cut pro freezes system when rendering

I was having the same exact issue, FCPX would freeze while rendering as would my entire computer. I have temporarily removed ANY plugins that were associated to FCPX and it fixed the problem. The one plugin in particular that was causing my freezing was MInstaller and mLut by MotionVFX (which has worked great on passed versions of FCPX).

Also note that before removing my plugins I deleted and re-downloaded FCPX and updated all of my software to no avail. The plugins were definitely the issue. I hope this bug is fixed in the next version and I hope this helps someone who was as frustrated figuring it out as I was.

I am pleased to report that the Mojave 10.14.4 update seems to resolve the issue.

I am doing a render in the background of complex 3D titles, and would not usually be able to type in this webpage at the same time (without it freezing every few seconds.)

Glad they sorted it, but frustrated at the lack of communication.

If the update doesn't appear in your App Store, search for Mojave, then click GET and it will detect the update.

Good luck!

Do you still need pace? This is very old and AFAIK is only needed to support some usb dongle for specific hardware-limited software, like Avid stuff. If you don't need it, you should uninstall, as it is known to not work very nicely with recent versions of the OS.

Yes, FCPX 10.4.5

It kind of freezes all windows for several seconds, works for a split second than freezes again in a loop.

if I remove all plugins, it just works fine.

But it’s not the FCPX Version. I just updated FCPX this morning because of the freezing problem because I thought the new macOS version would need to have the most updated version of final cut. But updating final cut to the latest version did not change anything.

only removing the plugins seems to help.

You're right, your system should handle this easily.

I am thinking there may be a conflict with other software.

If you have any antivirus installed, that would be my first suspect.

You could run the diagnostic tool Etrecheck and post its report here for us to take a look.

Some of the known bad actors may pop up in the report.

Create a new admin user. Reboot into that user. Make a new library. Download the BruceX Test

https://blog.alex4d.com/2013/10/30/brucex-a-new-fcpx-benchmark/

Run the test and report how the application behaves.

This issue is not caused by any third-party software/plugins. The same freezes can be easily replicated using Final Cut’s built-in titles and effects so it’s most likely a bug in the recent MacOS update. It only occurs on machines with an integrated Intel Iris Plus / UHD 5XX or 6XX series GPU (without a discrete or external GPU) so a faulty update for the Intel GPU drivers would be my best bet.

Anyone who has access to apple’s bug reporter - report it as soon as possible. Hopefully it will help them find and fix the issue faster.

I had to remove a few effects that I installed awhile back and also the Clean My Mac x and it started working smoother. I disabled the background render as well

I suggest just reverting back to Mojave 10.14.2 instead of messing with the plugins. I did that and it ended many weeks of suffering.

10.14.4, 10.4.6, 4.4.4 an 5.4.3 brought me back in full production mode (so far).

Same here. I finally updated today to macOS 10.14.4, using FCPX 10.4.5 - everything seems to work nice and smooth now.

Thanks misterblacktea for the update!

What has worked... sort of... has been closing FCPX and restarting. It will then briefly render all PixelFilmStudio plugins. However, this is a temporary fix. Once the computer goes to sleep or you leave FCPX to use another app, the freezing issue starts again. So again, temp fix but definitely Pixel Film plugin problem. It has to be a security issue implemented in 10.14.3

I'm hearing about people seeing better results after updating all Video Pro Apps (Final Cut Pro X 10.4.6, Compressor 4.4.4, Motion 5.4.3) as well as macOS Mojave 10.14.4. Can anyone else confirm?