Recent | Online | Vintage | Modern | XP | Win | Mac  OS9 | DOS | Amiga | Atari ST | Graphics | Midi io | Sequencers | Roland "MC" | E-mu | Ensoniq | Akai MPCs | Samplers | Akai "S" | Roland "S" |  Synths | VST Samplers | VST Synths | Roland "JV" | Modules | Drums | Mixers | Timeline | Hackintosh |  Artists | Graphics

Welcome to Oldschooldaw.com! (Online since 2014) serving vintage computers worldwide! this is our NEW WEBHOST as we've moved from our OLD GODADDY to a brand new server location to start off 2026. thanks to Godaddy for hosting the site for 11 years and a big thank you to IONOS.COM for the great pricing going forward! this site exists as a resource for historical archival of information + file resources neccessary to make use of vintage computer hardware + vintage music composition software that runs on those old platforms. conceived conceptually by Chris Nova to address the problem of  missing information + missing chronological references caused due to this information slightly predating the creation of the modern internet, much of the information here has been sourced from magazines + books as well as scraped from other websites that have since gone offline and wont be coming back.

Author Topic: mountain lion requires 64bit EFI  (Read 6009 times)

0 Members and 1 Guest are viewing this topic.

Offline chrisNova777

  • Underground tech support agent
  • Administrator
  • Posts: 10133
  • Gender: Male
  • "Vintage MIDI Sequencing + Audio Production"
    • www.oldschooldaw.com | vintage audio production software + hardware info
mountain lion requires 64bit EFI
« on: July 12, 2020, 06:47:23 PM »
https://arstechnica.com/gadgets/2012/07/confirmed-mountain-lion-sends-some-64-bit-macs-gently-into-that-good-night/

Quote
On those older Mac Pros that shipped with unsupported graphics cards, Apple hasn't deigned to update their firmware to support 64-bit EFI. You can run this command in Terminal to see whether you have a 32-bit or 64-bit EFI:

ioreg -l -p IODeviceTree | grep firmware-abi

All of the Macs dropped by Mountain Lion are going to return "EFI32" - if you can hack around that in addition to upgrading your graphics card, you may indeed be able to get Mountain Lion running on an older Mac, but it's a bit of a long shot.