[maherbeg]

I totally get this, but Apple made a conscious decision to not support 32bit machines. While it does suck to be caught on that border, they've done a tremendous job of supporting machines from that era that are 64 bit capable.

I don't think anyone should fault them for making that hard decision.

[yuhong]

They first dropped support for all 32-bit only machines with Lion, then some 64-bit machines (including I think all 945 chipset machines that have only 32-bit physical addressing) with Mountain Lion.