Actually, you will be needing that. If you're not at 10.1.5, it means you're still running 10.0, a horribly slow and crappy version of the OS, pretty much a second beta. 10.1 improves speed quite a bit, but you won't be able to buy it anymore. You'll have to buy 10.2, which is by far the best version out there. Trust me, you don't want to get behind with Mac OS X.
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