64 bit and the iMac 24",  3.06GHz Intel Core 2 Duo, 4GB memory

Hello,
I am confused about the whole 32 bit 64 bit situation
I have installed Snow leopard on my new iMac 24", 3.06GHz Intel Core 2 Duo, 4GB memory.
Can this machine run 64bit? I thought it was a 32 bit machine.
Any clarification would be greatly appreciated.

Most Apple application run in 64 bit mode no matter what. Third party apps will if they are designed to. The unix kernel defaults to 32 bit mode for compatibility reasons. You can switch it to 64 if you like. I tried it and lost my Kensington mouse driver. Switching back to 32 brought it back. There is very little reason a normal user would need to run in 64 bit mode... but dangit I WANT to! Sadly my extra mouse buttons are more important...

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