How to Check and See If Your Mac Runs 64-Bit

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mac_daddy

I have a white MacBook (2.2GHz, 10.5.8) and I was wondering if I could run 64-bit just to try it out. I did the check, and I can perform 64-bit computations on my hardware, but I don't know if my software permits it. I booted up holding the 6 and 4 keys, and nothing different happened... It seems to be exactly the same.

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