Enable 64 bit extensions?

Discussion in 'MacBook Pro' started by GVWR, Jun 29, 2011.

  1. GVWR macrumors newbie

    Aug 29, 2010
    State of Confusion
    System Profiler says "64-bit Kernel and Extensions: No"
    MBP5,3 with 4G of RAM and an Apple TS256A SSD.

    I've tried several of the recommended ways to enable it but none have worked so far.
    Any suggestions?
  2. snaky69 macrumors 603

    Mar 14, 2008
    Restart, reboot holding the 6 and 4 keys. You are simply booted in the 32-bit kernel as is default on all Macs.
  3. tonyunreal macrumors regular


    Feb 25, 2010
    All macs except for this year's models of iMac and MacBook Pro, they start in full 64-bit mode by default.
  4. hehe299792458 macrumors 6502a


    Dec 13, 2008
    right. My MBP boots in 64bit mode by default. However, it's really not that large of a difference compared to 32bit.
  5. sketdansu macrumors member

    May 25, 2011
    Except for Clear* USB Modems which don't work in 64-bit..smh
    *Lazy Bums

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