Looks like Snow Leopard does not boot into a 64bit kernel by default. There are a couple of ways to get some 64bit goodness.
Snow Leopard – 64bit
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Category Archives: Mac
Mac OS 10.5.6
An update is available now only through Apple Software Update. As of right now, download was not found on the apple.com website.
Mac OS X 10.5: Quick launch Front Row
Pressing Apple-Esc will launch Front Row. Pretty slick!