Final Cut Pro 12.3: endless bugs

Fortunately, Apple released FCP 12.4 tonight and in the bug fix list there is exactly:

• Fixes an issue that could cause a title's font type to revert after being changed.

I quickly tried on a project that was giving problems and seems to be resolved.

As BenB suggested, please post an https://etrecheck.com report using the "Additional text" button below in your reply and the group here can look for issues that could cause instability. As a longtime user of FCP, you've probably used it before, but if not, etrecheck is a free app created by a FCP user that generates an anonymized system report to help identify potential system software issues that can affect the ProApps.

I'm running 12.3 on a MBP M1 Max without these issues, also.

If you want to try to troubleshoot these issues and find a solution, we're here to help out.

But complaining with no serious question, that is not productive here.

We are all just end users helping each other along the way.

There is a feedback page (it's in the Final Cut Pro app menu).

You can also call Apple tech support.

What do you mean complication of multiple clips? I've no clue what that means.

Are you having issues with all fonts, or just specific fonts, and are they Apple stock fonts or third party fonts?

I've not seen anyone complain about FCP being slower on Golden Gate. There are several things that could cause this. Is your system drive full (at least 15% of capacity left as free space minimum)?

etrecheck

First of all, I'm sorry I turned to Apple, but after months this bug is still here and it's ruining the workflow. I've been using Final Cut since Final Cut Studio in 2007 and I've tried all of the manual fix, trust me. Reading around the web, it's a bug that many people are reporting and I've reported it to Apple. I initially thought it was a MotioVFX conflict between the “old” mInstaller and the new mExtension, but it doesn't even depend on that: I tried it on 3 Macs, one of which was installed from scratch including macOS. Tonight with macOS 27.0.1 it seems the situation has even gotten worse… it's a bug in the Font Book or in FCP character management. I hope an update comes, also because there are new machines (M6, M5 Ultra like mine). Thank you.

Please describe the font issue you're running into. There is one that has been discussed here regarding titles not retaining their font style settings when exporting. Is this what you're running into? If so, here's a link to the discussion. Final Cut Pro titles: Bold font reverts t… - Apple Community

I haven't had enough time to try yet. On the project I had to finish, I basically recreated the timeline from scratch because I thought the problem was copying and pasting from other projects with effects already created before. In fact, in the last project I didn't find any problems, but it was already ready and cut. I'll see with future projects soon: the fact is, I find version 12.3 one of the buggiest in the history of FCP and I've been using it for 20 years now.

Two points…

I run FCP 12.3 on an M4 Mac Mini. I do not experience ANY of these issues. FCP is stable and reliable, day in and day out. So the problem may not be within Final Cut, it could be something in your setup.

Secondly, this is a Final Cut Pro USER forum. Apple corporate does not read anything posted here.

What about all the other bugs you mentioned: an endless list of bugs and malfunctions, FCP always freezing, and being slow on macOS Golden Gate? Are those all fixed by FCP 12.4, or do they still exist?

I will second that FCP is slower in Golden Gate. VERY noticeably slower! Even after this bug fix.