Upgrading a MacBook Pro using OS10.6.8 to OS 10.10. Am I going to have problems with Photoshop CS4 and Illustrator CS5?
Photoshop cs4 works pretty well except for the pixel bender plugin, if you have that and the Output module Web Gallery preview makes bridge cs4 crash.
Also, since mac OS X 10.10 doesn't have Rosetta, no third party plugins for photoshop cs4 that require PowerPC code will work.
Ilustrator cs5 has at least one major problem like described in this thread:
Ensure that you deactivate the Adobe software before you upgrade the OS X operating system.