Running mac pro 1.1 on its max of lion why can't apple allow the boot efi to boot in 64 bit so we can install the latest software. This mac is very stable with 8 cores and 32gb of ram. Yosemite was running with piker's boot efi, why stop it?

Question

Running mac pro 1.1 on its max of lion why can't apple allow the boot efi to boot in 64 bit so we can install the latest software. This mac is very stable with 8 cores and 32gb of ram. Yosemite was running with piker's boot efi, why stop it?

As of october 2015 it would seem that apple have disabled the piker boot efi thus thrusting mac pro 1.1 users into the dark.

I am using a mac pro 1.1 and it ran smoothly in 64 bit mode on yosemite. Why are apple enforcing this lock out to users that have quite powerful systems that can handle the software.

I am frustrated by the continual progression in osx that is starting to block out users as the software limited to users that have been able to keep up. I'm now probably going to turn away from mac and seek a windows solution.

Can apple offer a clear reasoning that the mac pro 1.1 to 3.1 is not capable of running yosemite or el capitan?

Mac Pro, Mac OS X (10.7.5), Annoyed

Posted on Oct 4, 2015 5:57 PM

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Answer 1

Oct 4, 2015 8:58 PM in response to paulfromlowestoft

This is a User-to-User forum. So we do not speak for Apple.

I believe the control store on the earlier models is not large enough to hold the 64-bit microcode. The hobbyist hacks use additions placed in main memory instead of the control store.

Eventually these same guys will likely get around to updating this for 10.11:

http://oemden.com/sixty-four-on-thirty-two-sfott/

.

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Answer 2

Oct 6, 2015 8:41 AM in response to paulfromlowestoft

Check again on the piker site. They seem to have made some progress:

https://pikeralpha.wordpress.com/2015/09/27/el-capitan-support-for-unsupported-h ardware-is-here/

.

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Answer 3

lllaass

Level 10

210,411 points

Oct 6, 2015 8:56 AM in response to Grant Bennet-Alder

Grant Bennet-Alder Note that a week or so ago the hosts removed one of my posts that referred to the hacks to run > Lion on a 2006/2007 Mac Pro.

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Answer 4

Oct 6, 2015 12:10 PM in response to lllaass

Thanks for sharing that.

I was under the impression that using 64-on-32 was a respectable (but unsupported) way to run later versions of Mac OS X, since it built upon, and required, the 32-bit firmware be in place. (and therefore did not allow the building of a Hackintosh).

I will be more cautious in my recommendations in future.

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