Without a crash report it is only a guessing game as to causes.
But the most normal crashes are caused by 3rd party fonts and drivers (video card, printer, scanner).
Check to see if you have any of the usual suspect, or something you brought over from your other system that may not be compatible.
Thanks so much for chiming in. I checked all the fonts using Fontbook and they all check out alright. I don't know how to check video cards and drivers. I also don't know what you mean by "something I brought over from my other system". I'm using a new install of CS5 on a new MAC.
Also, can you tell me where to find the crash reports on a MAC? I'd love to find it and provide it if so. Thanks so much!
Font checkers may not detect a problem. They can tell if there is an error in the font, but can not tell if there is a conflict with photoshop.
The savest bet is to disable the directory with all the 3rd party fonts, and it you get no crash then add back in 1/2 and test, then add in another protion etc.
Not a Mac guy but you should have info in your help file to tell you how to access it. It is a very long report, and techinical.
Look for something that keeps repreating, like a program or font. If no luck post and someone here will should be able to interpret where the error is.
With a Mac the drivers should be up to date if you have the latest versoin of the OS.
The TWAIN driver can somethimes be a problem and should also be disabled. THere is no TWAIN drive for 64 bit programs.
Something to try, on a hunch:
1. Start Photoshop, do the prefs deletion.
2. As soon as it comes up, just Quit it.
Now test again without the three key salute to see if it comes up properly.
Hey thanks for trying Noel, but that didn't work.No matter how many times I try it the program still won't run unless I delete the prefs file. I appreciate your effort though