[Steve Rieck]

hi Dom, sorry I don’t have an immediate fix but I did want to report that I have three computers running OS 10.10.5 and Final Cut Pro 7 without issues… in fact I’ve been editing on one of them for three weeks straight with no problems at all. One thing you might want to try is creating a new user in the user and groups section of the system preferences. You could login as the new user and that might fix the problem? sometimes that sort of thing works for me.