I should have included a list of things I have tried already.
- Started new Project 100 times.
- Trashed Preferences.
- Created New Admin Profile, repeated above.
- Tried 5 different USB 3.0 7200RPM external Hard Drives.
- Disconnected Audio Interface and used built in sound card.
- Upgraded OS to El Capitan
- Removed 3rd Party Plugins
- Reinstalled FCPX
My system is a Late 2012 iMac i5 and has 32 Gb of RAM, 512VRAM on NVIDIA GeForce GTX 660M
Rebooting the system allows me to work flawlessly for about 10-15 minutes and then it starts acting up as I preview the clips. Seems like a cache file is overloading during the preview process. The reason I say this is because on a reboot it allows me to work flawlessly for 15 minutes before it acts up. At that point I have to force quit FCPX to get out. If I reopen the program it pinwheels on me right away when I hover over any of the content. Rebooting the system is the only way to clear it up to get anything done, but only 15 minutes. Has this maybe something to do with a Cache file? Or maybe my Hard Drive cache specs?