I've just installed Snow Leopard and attempted to download a trial version of an Adobe CS5.5 product, but an error message pops up each time I try to install it: "Adobe After Effects CS5.5 is installable only on a 64-bit system" Forgive me, but wasn't Snow Leopard supposed to be a 64-bit OS? I'm missing something here. I'm of the n00b variety, so please help me with answers in the plainest language possible. My computer is a 2006 1,1 Macbook Pro. I've checked the stickies about 64-bit and Snow Leopard, and I've tried pressing 6 and 4 at startup to force the computer into 64-bit mode, but it has no effect. This command: ioreg -l -p IODeviceTree | grep firmware-abi gave me the EFI32″ response. Does this mean I'm screwed? Because my computer is a 2006 MBP am I not going to be able to use any new Adobe CS products, or any product that has to run on a 64-bit system? If not, how can I force the computer to support those applications? ....Or is my only hope an eventual upgrade to a newer model? This is very frustrating, and I don't know if it's a user issue or a hardware issue.