Mojave 10.14.6 and Final Cut

I just got a new macbook pro that has Mojave 10.14.6 installed, and I'm running Final Cut 10.14.6

It worked fine for about a day, but when I opened a library today it will load fine, but wont actually play anything. I get the rainbow wheel for a while, then the viewer will show the option to pause (like it is playing) but nothing plays - and anytime you move the playhead or try and open any panels it just gets the spinning wheel for a while then doesn't do anything.

Anyone else having problems?

What are your hardware specs?

First thing I'd do is launch FCPX while also holding down the Command and Option keys together. Delete preference files. It's perfectly safe.

Once FCPX has launched, don't touch anything, go directly to Preferences, turn off Background Rendering.

Next, select the Library in the Browser, go to the File menu, "Delete All Generated Library Files" and in that window, delete ALL render files.

Quit, relaunch, see if that helps.

Besides what FCPX.guru said, verify you are not running the Chrome browser. There is a known incompatibility between newer versions of Chrome and FCPX. This is caused by Chrome monopolizing the VideoToolBox framework, thereby locking out FCPX and causing lags and hangs.

Thank you so much. I was having fits with FCPX. It hung each time I launched, and so far with your detailed instructions I was able to fix the issue. Hopefully it stays fixed.

I registered to say thank you but I will stick around as there is much to learn here.

Jude