4 ms·

Supports only 64 bit CPUs.

• eropple 14y ago
  Supports only 64-bit CPUs and EFI of a flavor that (while I don't remember the technical details) rules out some early 64-bit Macs.
  • rbanffy 14y ago
    So, Hacintosh. Any good reason for this limitation?
    • ryannielsen 14y ago
      I suspect the good reason is they didn't want to spend time making the 64-bit kernel support 32-bit EFI and didn't want to create and qualify an EFI update for 64-bit machines that have 32-bit EFI. Likewise, they probably didn't want to spend time supporting a 32-bit kernel when they stopped shipping machines which require it 5-6 years ago.
      • rbanffy 14y ago
        I think the only Mac shipped with a 32 bit x86 processor was the original 15-inch MacBook Pro. But I suspect the Intel GMA GPU may also play a part. I read the HCL and couldn't find a machine with anything less than an Nvidia chip. Anyway, 6 years is a long life for a laptop.
        • ryannielsen 14y ago
          Actually, many generations of Macs shipped with 32-bit processors. The first two generations of Intel 15" and 17" laptops, the first generation (at least) of Intel iMacs, and I believe three generations of Intel Mac Minis.