Am I running 64-bit on SL?

Discussion in 'macOS' started by AreYouAMac, Nov 2, 2009.

  1. AreYouAMac macrumors regular

    Jan 5, 2008
    I have the Blackbook 4,1 (2.4gh) - but I know by default SL runs 32bit on startup. This is SL 10.6.0

    But via Activity Monitor - I see Intel (64-Bit) running on most of my programs.


    Anyways - I thought programs are suppose to be running 32bit via SL since the macbooks/pros/imacs/ everything else besides XServe are efi 32bit?

    Attached Files:

  2. richard.mac macrumors 603


    Feb 2, 2007
    51.50024, -0.12662
    the apps and everything can run in 64-bit mode even if the kernel is 32-bit. looksy.
  3. AreYouAMac thread starter macrumors regular

    Jan 5, 2008
    K - That explains it. No need to boot into 64 bit SL. So I wonder why everyone was fussing over that.

    Well - I guess I will have the best of both worlds. Windows 7 64 bit and SL 32/64 bit also.
  4. Eric S. macrumors 68040

    Eric S.

    Feb 1, 2008
    Santa Cruz Mountains, California
    No Macbook (as opposed to Macbook Pro) will boot the 64-bit kernel. It's an intentional limitation on Apple's part.

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