Currently Being ModeratedOct 9, 2012 3:14 AM (in response to rthorderson)
Open Activity Monitor and select the CPU tab.
Look for PID 0 kernel_task.
At the right side it will say (64 bit).
Mountain Lion is 64 bit by default.
I don't think a 32 bit kernel even exists.
Currently Being ModeratedOct 9, 2012 5:28 AM (in response to Retired Engineer)
No PID 0 is displayed (or anything named kernel_task). Everything in the Process List is running with kind = 64bit, but from my reading, that doesn't mean the 64bit kernel is running. Also, my MacPro 3,1 is one of the oldest machines that WILL run 10.8.2, but it also has the distinction of not defaulting to 64bit (at least that is my understanding), where newer machines will.
I may be OK, but it would be nice to be able to confirm definitively...
In the terminal, a uname -a produces this...
Randys-Mac-Pro:~ randythorderson$ uname -a
Darwin Randys-Mac-Pro.local 12.2.0 Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64 x86_64
Is the bold my confirmation?
Currently Being ModeratedOct 10, 2012 3:55 AM (in response to rthorderson)
Change the display mode at the top right of the screen to
PID 0 must be there. The machine can't function without it.
Currently Being ModeratedOct 10, 2012 4:09 AM (in response to Retired Engineer)
Ahhhh, PERFECT...changed Activity Monitor to ALL PROCESSES and the kernal_task is indeed running as kind = 64bit.