As far as I know, everything worked fine under Mavericks 10.9.5 for me.
However, I installed Yosemite, and then reverted back to Mavericks 10.9.5 through internet recovery.
Now Photoshop keeps crashing for me. Seems to be linked to entering menus, as it seems to work fine if I keep drawing on a workspace and doing nothing else after starting Photoshop.
Crash report
Process: Adobe Photoshop CS6 [3341]
Path: /Applications/Adobe Photoshop CS6/Adobe Photoshop CS6.app/Contents/MacOS/Adobe Photoshop CS6
Identifier: com.adobe.Photoshop
Version: 13.0.6 (13.0.6.54)
Code Type: X86-64 (Native)
Parent Process: launchd [157]
Responsible: Adobe Photoshop CS6 [3341]
User ID: 501
Date/Time: 2014-10-20 20:00:56.673 +0200
OS Version: Mac OS X 10.9.5 (13F34)
Report Version: 11
Anonymous UUID: 0C90E81B-C196-1AAD-AADE-E29B53BAEC86
Sleep/Wake UUID: 0EFEAF1D-6723-4024-9500-E62614681A80
Crashed Thread: 0 Dispatch queue: com.apple.main-thread
Exception Type: EXC_BAD_ACCESS (SIGSEGV)
Exception Codes: KERN_INVALID_ADDRESS at 0xffffffffffffffff
VM Regions Near 0xffffffffffffffff:
--> shared memory 00007ffffff10000-00007ffffff11000 [ 4K] r-x/r-x SM=SHM
Logical CPU: 2
Error Code: 0x00000004
Trap Number: 14
I tried to add the crash report, but I get "Please try again later m5" as a message. It seems the content text is too big (just guessing)?