64-bit vs 32-bit kernel

Discussion in 'Mac OS X Lion (10.7)' started by mark28, Aug 23, 2011.

  1. mark28 macrumors 68000

    Joined:
    Jan 29, 2010
    #1
    What should i use with Lion? 64-bit or 32-bit kernel extension?
     
  2. bully worm macrumors regular

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    Sep 17, 2009
  3. tersono macrumors 68000

    tersono

    Joined:
    Jan 18, 2005
    Location:
    UK
    #3
    Lion only supports 64 bit. If you're running Lion, you're running the 64bit kernel
     
  4. paulsalter macrumors 68000

    paulsalter

    Joined:
    Aug 10, 2008
    Location:
    UK
    #4
    I am confused if Lion only runs a 64bit kernel

    system info for my mac on lion says

    64-bit Kernel and Extensions: No
     
  5. sidewinder macrumors 68020

    sidewinder

    Joined:
    Dec 10, 2008
    Location:
    Northern California
    #5
    This is incorrect. My Mac Pro (Early 2008 model) ran with a 32-bit kernel by default.

    S-
     
  6. toxic macrumors 68000

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    Nov 9, 2008
    #6
    your computer can only support 3GB of RAM, so 64-bit support doesn't do squat anyway.
     
  7. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #7
    But it's faster, right?:rolleyes:

    (please get the sarcasm and don't drop a diatribe on me thanks)
     
  8. mark28 thread starter macrumors 68000

    Joined:
    Jan 29, 2010
    #8
    Some benchmark show that 64-bit kernel is actually faster than the 32-bit kernel with Snow Leopard.

    Not sure if this is true in Lion though.
     
  9. derbothaus macrumors 601

    derbothaus

    Joined:
    Jul 17, 2010
    #9
    You'd need at least 8GB memory and a crisp eye on fractional gains for this to be true. On Lion it most likely is faster as they spent more time developing in 64-bit kernel rather than 32-bit kernel. I know 64-bit kernel drains my battery more;) Rest is placebo.
     
  10. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #10
    I run Lion on a 2008 MacBook, and it's using a 32-bit kernel.
     

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