Photoshop cs6 as well as Illustrator cs6. Impossible to work on after 10.9 Mavericks update. Software freezes while opening a file, editing smart object, saving (not always). Freeze can be as long as few minutes. Happens to me and couple other coworkers (others are fine). We are running MacBooks pro 2.3 i7 to 2.7 i7 with 16gb of ram. Seems that this is very common problem, many others are trying to downgrade to M lion again in order to be able to do their job. I have tried many things (updating Java, disabling graphic acceleration) nothing helps.