[OS X TeX] 64-bit binaries in TeXLive 2010

Adam R. Maxwell amaxwell at mac.com
Sat Dec 5 12:46:59 EST 2009

On Dec 5, 2009, at 8:13 AM, Michael Hanson wrote:

> On Dec 4, 2009, at 10:54 PM, David Watson wrote:
>> The only strictly 32-bit Intel machines that I know of from Apple are the original MacBook Pros that have the "Core 2" label.
>> Everything since has been 64-bit capable, even if Apple hasn't made it a priority to exploit that fact before Snow Leopard.
> While admittedly a minor point in this debate, I believe the situation is not quite that simple.

Indeed :).

> ioreg -l -p IODeviceTree | grep firmware-abi
> If you see "EFI64", then your Mac supports the 64-bit kernel; otherwise it does not.  Again, any Mac with a 64-bit processor should still be able to run 64-bit applications under OS X 10.5 or 10.6, regardless of whether the kernel is 32- or 64-bit.

My MacBook Pro has EFI64, but won't boot the 64-bit kernel.  This doesn't bother me, but it confuses the issue a bit more.


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