Check if your Mac is 64 bit
Here’s an easy way to determine whether or not your Mac is 64 bit capable. Open Terminal.app, which is located in /Applications/Utilities and type in
sysctl hw |grep 64bit.
If your machine is 64 bit capable, the result will be
hw.cpu64bit_capable: 1
If your machine is not 64 bit capable, the result will be
hw.cpu64bit_capable: 0
Tip source: OSXDaily.com
This only appears to indicate that your Mac can run 64-bit applications. It does not indicate whether you can run Snow Leopard’s 64-bit kernel.
Thanks for the heads up, I wasn’t aware of this.