I recently upgraded from the Creative Design Suite CS3 to the Master Collection Suite CS4. Everything runs great, with one exception: Adobe Premiere Pro, which is THE reason I decided to go with the Master Suite. I was so impressed with On Location to manage my rapidly growing stock footage library, which is part of Premiere Pro and you can't use it, if Premiere Pro crashes on launch. I spent all day on the phone with Adobe tech support, being routed deeper into their system three times before I reached the Premiere Pro expert. He was pleasant and patient and we tried everything he knew, but without success. He said, "it's an extension conflict with Apple, and they'll have to fix it before my program will work on a Mac.
When you invest $2,400 in software--this is not the "pass the buck" solution you expect. Waiting for some programmer to write some code in the hopes you might eventually be able to use this software. If I want it sooner, I'll have to pay $70 an hour to speak to Apple tech support. Then, today, I watched a tutorial on Premiere Pro CS4 on a Macintosh computer. Go figure! If you're on a Mac, I'd hold off buying this upgrade until the bug fix is in. If anyone has an answer, I'm ready to hear it.