Multiple issues: Read carefully: Solution to all:

Folks I've been using FCP to edit a feature, RED footage. Multiple times I came across serious problems which could have sunk the entire film. Especially this apple discussion board - there are a bunch of "experts" who just ask the standard questions: "what's your drive formatted to", "Use this 3rd party software to run a scan" and not on one occasion was a solution provided. In fact when I hinted at this the moderator deleted my post.

Here are some of the issues: Issue 1: Audio output via X2Pro suddenly stopped working. X2pro said contact FCP.Apple. Apple said contact X2Pro. Discussion boards no clue. Issue 2: Suddenly project stopped snapshotting (duplicate was fine) + would not copy into a new library. Issue 3: Biggest issue: FCP stopped opening. "Waiting to validate audio units". Worse - every single back up dated back to 6 months to the very first back up also suddenly stopped opening.

As you can imagine it was a traumatic time - these issues cost approximately 7 weeks of time in total. But luckily luckily all eventually got resolved. If you ever have any of these three issues pop up just message me.

And most importantly- make a back up of the fcp project with the media every 3 days at the very latest. Trust me - one day this advice will save you. This is the one thing that will resolve everything and anything. If you are working on FCP you MUST make a full project back up every three days at the latest (ideally every day). I know it sounds excessive - but one day - one day soon you will thank me.