One of the main reasons for OS X was exactly this. Every version of OS X has been compiled for the x86 Arcutechture. As Jobs said " OS X has been leading secret double life". Part of the reason was to make this transition quick and painless when the time came.
And I dont see it becoming yet another Linux clone for two reasons. Firstly its far superior to any Linux distro I have used, OS is stable, seamless and somewhat decent looking. Compare this to any other mainstream Linux distro and all you get is the same patchwork nonsesne with a few diffrent config tools and a diffrent sticker on it. As far as dektop Linux distro's go, MacOS rules unfortuantly.
Seconldy dont be fooled into thinking you can run MacOS on your PC. This wont be the case (at least not officialt
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