Snow Leopard 64-Bit

Discussion in 'MacBook Pro' started by w00t951, Apr 18, 2010.

  1. w00t951 macrumors 68000

    w00t951

    Joined:
    Jan 6, 2009
    Location:
    Pittsburgh, PA
    #1
    I have the 13" Macbook Pro 5,5. I want to boot into Snow Leopard so I can address my 8GB of RAM, but I can never get it when I press 6 and 4 at the same time during the white screen. Is there a specific trick that you have to do? In Terminal, it says that my EFI is 64 bit.
     
  2. alphaod macrumors Core

    alphaod

    Joined:
    Feb 9, 2008
    Location:
    NYC
    #2
    You only need the 64-bit to access more than 32GB of RAM, so you are fine.
     
  3. macuserx86 macrumors 6502a

    macuserx86

    Joined:
    Jun 12, 2006
    #3
    OS X can address the 8GB even in 32 bit mode. That said, the 64 bit kernel is a bit faster on my Mac Pro (haven't tested it on any other machine).

    read this article and see if it helps.

    edit: I guess it's disabled on the 13" That sucks.
     
  4. MikhailT macrumors 601

    Joined:
    Nov 12, 2007
    #4
    Use this system prefs pane, it works for me on 10.6.3.

    http://www.thrull.com/corner/mac/SystemModeConfigurator/
     
  5. w00t951 thread starter macrumors 68000

    w00t951

    Joined:
    Jan 6, 2009
    Location:
    Pittsburgh, PA
  6. MikhailT macrumors 601

    Joined:
    Nov 12, 2007
    #6
    What are you whining about? Just use the app I linked and it'll work.
     
  7. CaptainChunk macrumors 68020

    CaptainChunk

    Joined:
    Apr 16, 2008
    Location:
    Phoenix, AZ
    #7
    The lack of a 64-bit kernel won't prevent your machine from addressing 8GB of RAM. My Mac Pro in my editing rig is still on OS 10.5 (32-bit kernel only) mostly for hardware compatibility reasons and it still addresses all my RAM and even uses the majority of it in some situations.

    The main reason why Macs ship with the 64-bit kernel disabled by default is for driver compatibility. Not all drivers have 64-bit extensions. The article referenced earlier in this thread does a pretty good job of explaining the pros and cons of booting into the 64-bit kernel.
     
  8. dude2010 macrumors newbie

    Joined:
    Jan 14, 2010
    #8
    Photoshop CS4 and Lightroom 3 beta2 that is a 64bit app - runs a LOT smoother, fluent and faster with my 2yrs old MBP running newst snow, 4gb ram... Nice!
    AND I had a mouse/keyboard freeze problem, running first half hour with no lockup...
    Thanks a lot homie!!
     
  9. piwi macrumors regular

    Joined:
    Dec 24, 2006
    #9
    Mine is much slower to boot in 64bit and Xbench reports lower results, that's odd...

    9600M GT 32 vs 64bit (click to enlarge)
    [​IMG]

    9400M 32 vs 64bit (click to enlarge)
    [​IMG]
     
  10. dude2010 macrumors newbie

    Joined:
    Jan 14, 2010
    #11

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