On newer iMac after Yosemite upgrade, PS CC 2014 stops on welcome screen, color wheel spins endlessly. I have called support 3 times now, wasn't called back once, was hung up on once after the tech "went to check something." waiting for 3rd tech on hold now.
Tried suggestions to uninstall/reinstall, change user and system permissions to read/write, rename System Package /Contents/MacOS/CEPHtmlEngine and /Required/CEP/extensions/co,.photoshop.welcome.
WTF am I paying for here? My question hasn't been answered once. 3rd call to tech support, tech had no solution and said "I heard we're going to have a big meeting about this but we can't guarantee any solution until next week maybe." What a lame, lame company you have. Seriously. I'm telling all my clients that Adobe has no solution and no timeframe for a solution, because this is what I was told.