Well, that's the original iMac. The "best" it can run is Panther (OS X 10.3). But it'll be REALLY slow. AND you HAVE to max out the RAM on it, and that depends on which rev you have, A maxes out at 384 or B maxes out at 512. And the HD is likely too small to install OS X on and some apps and then store data. It's only a 4GB hard drive. And finally, to me it looks like the MINIMUM specs for Adobe's Creative Suite (I assume that's what you're talking about?) is just above what that iMac can do. If you COULD install it and get it working, it would be PAINFULLY slow. I suggest it time to upgrade to a newer Mac.
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