Final Cut Pro keeps crashing

*basically keyframes images moving about on top of other keyframes images on static or generated backgrounds

Hi Ian, many thanks for the reply ! Yes I saw a few mentions of cleanmymac so removed it before the etre scan, maybe I needed to restart the Mac before it was completely removed. I held off on updating to latest version until the project was finished so I have not updated it no. As for repeatedly I can't recall exactly doing that but when I switched from a MacBook Pro to a studio might have done that initially getting everything up and running.

The project is a mixture of 4k video and lots of keyframes. It's a video for kids telling a story which switches between video footage and animated sequences (basically images keyframes moving about on top of other images with lots of sound effects and plug in effects). It is currently about 21 minutes long, only 4 minutes to go !

The event is in a project currently at 24gb of size. The crashes started on a specific compound clip of a generated background, video footage and some key framing), it got quite slow then kept crashing when I tried to render it and now is free crashing all the time. Do you mean just start a new project altogether with completely new base materials to see if that crashes thereby pointing the figure at that suspect compound clip if it doesn't ?

The compound clip does appear to have been the issue, thanks for your input Ian it was very helpful, I will remember what you said about starting a different project in future as a way of narrowing the problem down to the program or the inputs thanks a lot !

Excellent idea and it appears to have done the trick, elegant fix, take it out of the equation altogether whilst leaving it in! Not the first time you've helped me Luis, I am grateful, thank you!