via hbwt - UNIX under the Desktop

Regardless of the technical and religious differences that separate the many breeds of UNIX, expertise at one ports well to another: from Solaris to HP-UX to AIX to Linux to BSD to Darwin and OS X. If you want to hack, the environment is there--so are the tools and the community.

Put another way, OS X gives us the first popular desktop OS that fits into a prevailing Linux environment and also into the prevailing marketplace. On the bottom, it's UNIX. On the top, it runs Microsoft Office and the whole Adobe suite. This has its appeals.