Yes, OS X is Unix based (loosely based on FreeBSD) But that's about where the similarities end. Its kludgy, clunky (gah... the GUI, Aqua, while pretty is just eye-candy and a waste of CPU clock cyclesin my opinion) At least they bundled a Developer CD with it (with a compiler and stuff) Personally, I'll stick with OS 9.0 on my Mac. I don't use it enough to justify the $129.95 upgrade cost. If I want to run a Unix based system, I'll download Linux for free. Oh yea. I guess that's one MORE difference between OS X and Linux. If I don't like one flavor of Linux, I'll just vape it and download another one, free of charge. MacOS X is just like the Windows variants in that you have to purchase the damn things, and you have no recourse if you don't like the OS (you're stuck with it)
-Gloftoe