Reply to thread

Message

<blockquote data-quote="harryb2448" data-source="post: 1724166" data-attributes="member: 42497">All Mac Pros 3.1 are 64bit architecture.&nbsp; The fact you are running Yosemite confirms this.&nbsp; Mac Pros model 1.1 and 2.1 whilst having 64bit archictecture, were limited for some reason to 32bit EFI.&nbsp; To activate the 64bit kernel have a read of this link with several suggestions.&nbsp; Note the improvements for photographers.&nbsp; Just enjoy Mike knowing your model does not have the handicap of 32bit EFI.I would suggest at least downloading El Capitan OS X.11 and making an 8GB USB thumb drive installer even if you don't use it for now.&nbsp; DiskmakerX is an easy to follow method of making the bootable thumb drive.&nbsp; From early reports El Capitan is the final operating system for your Mac Pro.&nbsp; mac osSierra is going to require a 2010 Mac Pro.<a href="http://macperformanceguide.com/SnowLeopard-64bit.html" target="_blank">http://macperformanceguide.com/SnowLeopard-64bit.html</a></blockquote>

[QUOTE="harryb2448, post: 1724166, member: 42497"] All Mac Pros 3.1 are 64bit architecture. The fact you are running Yosemite confirms this. Mac Pros model 1.1 and 2.1 whilst having 64bit archictecture, were limited for some reason to 32bit EFI. To activate the 64bit kernel have a read of this link with several suggestions. Note the improvements for photographers. Just enjoy Mike knowing your model does not have the handicap of 32bit EFI. I would suggest at least downloading El Capitan OS X.11 and making an 8GB USB thumb drive installer even if you don't use it for now. DiskmakerX is an easy to follow method of making the bootable thumb drive. From early reports El Capitan is the final operating system for your Mac Pro. mac osSierra is going to require a 2010 Mac Pro. [url]http://macperformanceguide.com/SnowLeopard-64bit.html[/url] [/QUOTE]

Verification

Name this item. 🍎