Mac OSX and Cybershot
Well, I haven't personally been able to experience this awesome OS, but some Cybershot Users have. One user claims drivers in OS X 10.2.1 (Jaguar) work 100%.
Another Cybershot Enthusiast has found a compatibility grid from Sony that has the S-Series Cybershots listed with full support for all versions of Mac since 8.5. Although this only lists older models, I would certainly take that as all Cybershots using the USB Interface would be compatible as well.