Now, it sounds like you're looking for Connectix Virtual Game Station, which can be picked up over on Macintosh Garden. I never used it for Mac, and really, you're going to have a much better time with ePSXE, or even whatever PS1 emulator comes with Retroarch. Can you emulate PS1 games on your hardware? Probably. At full speed? Maybe. Is it the best? Absolutely not. It just had better game support at the time it was in active development, something that ended about 20 years ago.