I've taken the plunge and installed Snow Leopard (aka Mac OS X 10.6) and was pretty psyched about the fact that it's a 64-bit operating system, until my brother said "yeah, but I bet you're still running in 32-bit mode". How can I tell if my Snow Leopard computer is now running in 32-bit "compatibility" mode or as a true 64-bit operating system?...

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I can still remember the first Mac I used: it was a 512K unit that the fine folk at the Whole Earth 'Lectronic Link loaned me when they hired me to hack their discussion system and make it faster. At the time I'd just left my job at Hewlett-Packard and had no computer of my own (back then people didn't have computers unless they were hardware hobbyists or could handle cassette backups). To the proffered...

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