Is there any reason not to run Snow Leopard 10.6.4 in 64-bit?

Discussion in 'macOS' started by SimplySd, Jul 12, 2010.

  1. SimplySd macrumors newbie

    Jul 11, 2010
    Isnt it twice as fast as 32-bit? Can someone clarify...
  2. Mal macrumors 603


    Jan 6, 2002
    It's nowhere close to twice as fast, and in certain use cases can actually be slower, and many system extensions and third-party programs will either not work or may have issues, so it's not recommended for just about anyone. I think the fact it's not enabled by default, and in fact requires a bit of research and a bit of a hack to even run in the 64-bit kernel by default should be a tip-off that it's probably not for the average user.

    In other words, you're not likely to see much (if any) benefit, and it's very possible it could cause issues for you, so don't try unless you find that exciting. I personally prefer my machine to work, so I run the 32-bit kernel for now.

  3. TK2K macrumors 6502


    Jun 4, 2006
    If you have large amounts of ram (8gb+) it can help significantly with addressing issues
  4. MacsRgr8 macrumors 604


    Sep 8, 2002
    The Netherlands
    I think the OP was talking about the Kernel running in 64 bits. The apps are 64 bits fine anyway, even on 32 bits Kernel.

    I have my Mac Pro on 64 bits Kernel for months now, and haven't had any issues. Only when SL was just available, did I have an issue with either Fusion or Parallels.
    But, other 3rd part kexts can go wrong of course.

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