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I am trying to start my OS X 10.10 in 32 bit, but with no success:

  • First I tried it by keeping 3 + 2 pressed during start up
  • Then I tried by the following command: sudo systemsetup -setkernelbootarchitecture i386

In both cases all I get RELEASE_X86_64 x86_64 by running uname -a

Is it possible at all to force 32 bit on OS X 10.10?

  • This is my processor: i7-2675QM
  • I have hardware drivers that only support 32 bit for AWUS036H

Is there another way to use that hardware with 10.10?

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  • Would appreciate to know the reason for the down vote
    – user145568
    Sep 6, 2015 at 7:18
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    Don't know why you were down voted as your question is a legitimate one, although you probably could have Googled and found out that 10.6 was the last 32-bit version of OS X. Anyway, I up voted strictly on the basis there appeared to be no valid reason for the down vote.
    – user3439894
    Sep 6, 2015 at 10:31
  • What's the real problem to be solved? Once you get booted in 32 what are you trying to do? What makes you think the kernel is even compiled as a 32 bit executable anymore?
    – bmike ♦
    Sep 6, 2015 at 14:34
  • I think it would help if you clarified what "AWUS036H" is.
    – Andrew Ferrier
    Sep 6, 2015 at 15:24

2 Answers 2

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According to http://www.alfa.com.tw/products_show.php?pc=34&ps=92, AWUS036H is only supported up to OSX 10.6. If you need a kext or similar to use the device, you will be out of luck with 64bit only versions of OSX (which means 10.7 and higher).

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    I wonder if you could run 10.6 in emulation and pass the USB port directly to the virtual machine and use the hardware? It would be a lot of work and probably cheaper to just buy another device, but sometimes doing this "for reasons" is a learning journey.
    – bmike ♦
    Sep 6, 2015 at 14:38
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Why?

All OS since Snow Leopard are 64 bit only.

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  • I have a piece of hardware which is only 32 bit compatible AWUS036H.
    – user145568
    Sep 6, 2015 at 6:41

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