Quote:
Originally Posted by Porsche-O-Phile
Mac OS is built on Linux.
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Nope, the OS X kernel is based on Mach which is a BSD based micro-kernel, and while it used to be Freely licensed it no longer is. A lot of the userland stuff down underneath the shiny is the various BSD utilities (w/ the BSD license) which are very similar to the GNU utilities (with the GPL v2 or v3 license) but hte GNU project had to re-implement everything due to copyright issues in the mid to late 80s. While the OS X kernel isn't open and available anymore, the userland stuff is and is referenced as Darwin if you want to go looking for it. Unfortunately, there isn't a lot of useful things that can be done with Darwin that you can't do easier with Linux or one of the BSDs (depending on your licensing needs/wants/desires).