leicaman
Level 1 (0 points)

Q: Will Lion run on a 2007 Dual-Core Xeon Intel MacPro V1.1?

Will Lion run an a 2007 Dual Core Intel Xeon 2.66GHz Intel MacPro?  (32bit EFI) but 64bit machine... 9 GB RAM

MacPro, Mac OS X (10.4.8)

Posted on May 24, 2012 10:12 AM

by Niel,Solvedanswer
Niel Niel
Level 10 (313,488 points)
Mac OS X
A:

Yes.

 

(66652)

Posted on May 24, 2012 10:15 AM

Close
leicaman

Q: Will Lion run on a 2007 Dual-Core Xeon Intel MacPro V1.1?

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  • Helpful answers

  • by Niel,Solvedanswer

    Niel Niel May 24, 2012 10:15 AM in response to leicaman
    Level 10 (313,488 points)
    Mac OS X
    May 24, 2012 10:15 AM in response to leicaman

    Yes.

     

    (66652)

  • by The hatter,

    The hatter The hatter May 24, 2012 1:43 PM in response to leicaman
    Level 9 (60,935 points)
    May 24, 2012 1:43 PM in response to leicaman

    Not only yes but any Mac Pro will (but not Mountain Lion)

     

    http://www.apple.com/support/lion

  • by leicaman,

    leicaman leicaman May 24, 2012 1:56 PM in response to The hatter
    Level 1 (0 points)
    May 24, 2012 1:56 PM in response to The hatter

    Why not Mountain Lion?

  • by The hatter,

    The hatter The hatter May 24, 2012 2:03 PM in response to leicaman
    Level 9 (60,935 points)
    May 24, 2012 2:03 PM in response to leicaman

    You want the silver platter, the plain fact that you can't use 64-bit kernel that it is built on due to your firmware being 32-bit EFI.

  • by leicaman,

    leicaman leicaman May 24, 2012 2:08 PM in response to The hatter
    Level 1 (0 points)
    May 24, 2012 2:08 PM in response to The hatter

    I had understood that the only thing that the 32bit EFI prevented me from doing was accessing more that 4GB of RAM per processor core... but that my OS was running in 64bit and all my 64bit programs were running 64bit.  Is this incorrect?

  • by Grant Bennet-Alder,

    Grant Bennet-Alder Grant Bennet-Alder May 24, 2012 6:07 PM in response to leicaman
    Level 9 (61,110 points)
    Desktops
    May 24, 2012 6:07 PM in response to leicaman

    About this Mac > ( More Info ) > Software 

     

     

    System Software Overview:

     

      System Version:          Mac OS X 10.6.8 (10K549)

      Kernel Version:          Darwin 10.8.0

      Boot Volume:          X-Drive

      Boot Mode:          Normal

      Computer Name:          Grants-MacPro

      User Name:          Grant (grant)

      Secure Virtual Memory:          Not Enabled

      64-bit Kernel and Extensions:          Yes <

      Time since boot:          10:38

     

    Mac OS X: 64-bit kernel frequently asked questions

     

    -

  • by The hatter,

    The hatter The hatter May 25, 2012 7:41 AM in response to leicaman
    Level 9 (60,935 points)
    May 25, 2012 7:41 AM in response to leicaman

    4GB of RAM per processor core -  this has no standing.

     

    32-bit processes address up to 4GB address space

     

    There is an urban legend rule of thumb of how much physical memory you want for a dual processor quad core (or dual core etc) but that has no bearing.

     

    64-bit kernel mode is separate from the OS and does allow processes to work with large address spaces.

     

    Should you boot into the 64-bit kernel?

    Tests of photographic applications show that the gains of booting with the 64-bit kernel can be substantial, keeping in mind that a 30% gain via hardware often costs several thousand dollars more. Why not get a good chunk of that for about $25?

    Your 64-bit programs (if any) will run fine on a 32-bit kernel, gaining the benefits of 64-bit-ness. But they won’t see full performance that way.

    The reason not to boot into 64-bit mode is compatibility with software drivers of various kinds. Apple really can’t be faulted here, but you can make an intelligent choice for yourself. You’ll want to verify if your software has any issues in 64-bit mode.; one way is simply to try it.

    Does your Mac have 64-bit EFI firmware? PERMALINK

    You Mac might be a few years old and have 32-bit EFI firmware (the code that runs to boot the Mac). See this Apple tech note for which machines can boot the 64-bit kernel

    With 32-bit firmware, you cannot boot into 64-bit kernel; it’s not possible.

    http://macperformanceguide.com/SnowLeopard-64bit.html

  • by David Bear1,

    David Bear1 David Bear1 Jul 26, 2012 5:33 PM in response to leicaman
    Level 1 (20 points)
    Jul 26, 2012 5:33 PM in response to leicaman

    Leicaman.. how's it going man.. time to upgrade that dinosaur...lol.

    Email me dude.