Lion Kernel issue Macbook pro 13 mid 2010

Discussion in 'Mac OS X Lion (10.7)' started by Danielxc, Jul 20, 2011.

  1. Danielxc, Jul 20, 2011
    Last edited: Jul 20, 2011

    Danielxc macrumors newbie

    Joined:
    Apr 28, 2011
    Location:
    Brazil, Curitiba.
    #1
    hi everyone,
    i have macbook pro 13 mid 2010, i update my system os x to lion about 2 hours ago..
    have question, before update i use snow leopard 10.6.8 with kernel 32 bit.. after update to lion i still use kernel 32 bit .. (by Activity Monitor)
    it's should be 64 bit right ?
    when i try change kernel with button 6 and 4 press when start .. kernel change 64 bit..
    in my mind os x lion kernel aways run 64 bit ...

    why my kernel stay 32 bit after update ? anyone know ?
    thanks..
     
  2. webjprgm macrumors newbie

    Joined:
    Jul 20, 2011
    #2
    32 vs 64 bit kernel

    Maybe Apple has a list on their web site of which machines will boot to 64-bit by default. I also would expect a 2010 model to be on the 64-bit list.

    A work-around is to add "arch=x86_64" to your boot args, which is basically like holding 6 and 4 at boot. You can do this by going to Terminal and running this command:

    Code:
    sudo nvram boot-args="arch=x86_64"
    I've only found an article from Snow Leopard about which machines boot to the 64-bit kernel by default. Note that you can run 64-bit apps from the 32-bit kernel if you have a 64-bit processor.

    http://support.apple.com/kb/HT3770
     
  3. Danielxc thread starter macrumors newbie

    Joined:
    Apr 28, 2011
    Location:
    Brazil, Curitiba.
    #3

    thanks..
     

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