[Peter Henry]

Andy, among the first fixes I tried when the problem appeared was to Repair disk permissions with Disk utility but the result was the same.
Thanks.

[Peter Henry]

The solution for me was to open FCPX after logging in with an unused username (which I had created a long while before but never used). The software seems to function normally now under this username.

For what it is worth, I even backed up the Prefs for FCPX while signed in to the “good” FCPX then logged out and logged back on under the username associated with the “problem FCPX ” , thrashed it’s prefs and restored using the prefs file saved from my “good FCPX” ( I hope I haven’t lost you by now). Unfortunately, that did not fix any of the issues either.

I guess that until I find the time to clean the drive and start over I’ll resign myself to using my alternate username expressly for editing with FCPX. Not a fix but a workable solution.

Regards

[Peter Henry]

Not a clean install, I updated Mavericks from Mountain Lion.

[Peter Henry]

No, Jeremy, I did not do a clean install. I just sent the App to trash, rebooted then re-installed. I will check out the link you shared and experiment with a new user. Will update re the outcome. Thanks for the suggestion.
Peter

[Peter Henry]

Hi Jeremy,
I am using OS 10.9 Maverics
Regards

Peter