On my early 2008 Macbook Pro I keep recieving an error message for not having enough RAM from PS CC.
PS CS6 works fine and has always, however with CC I keep recieving this error message at times even before I open a single image. Once its starts I cannot even File>close PS
I have done the preferences erase, and tried to see how to switch from 32/64 Bit (Which I could not figure out how to do as it is not in my "Get Info" tab) to no success.
The error is somewhat generic. Make sure you have enough free disk space (10 -20%) and enough scratch disk area. You will not be able to run 3D with only 256m of VRAM.