Every time I hit ⌘ + Q in Safari it freezes it completely and goes unresponsive, so far I have done every thing possible to fix this issue. I made a video if you don't understand what I'm talking about. I contacted Apple and they told me to do a Time Machine back up than do a complete OS reinstall. I reinstalled OS X from the recovery menu and than I migrated to my Time Machine back but Safari still doesn't work when I hit quit. I also tried everything here I deleted all the Safari caches, preference files, application saved states. I'm gonna head out to the Apple Store in a bit just wanted to see if I can get some last minute help before I head out.
OS X 10.10.3 MacBook Pro (Retina, 13-inch, Mid 2014) Safari: Version 8.0.5 (10600.5.17)