Updating firmware on 10.13 unsupported Macs?

Discussion in 'macOS High Sierra (10.13)' started by nekton1, Jul 5, 2017.

  1. nekton1 macrumors 6502

    Joined:
    Apr 15, 2010
    Location:
    Asia
    #1
    The new APFS relies on a firmware update to boot APFS disks but Apple obviously is never going to release firmware for older "unsupported" Macs although many models like the cMP3,1 can run High Sierra fine with a little modding/tweaking (thanks dosdude and foxlet).
    Back in the day, some kind person released a way to update the 2009 MP firmware to the 2010 version, giving those old 2009 Macs a new lease on life and keeping them out of landfill.
    Is the effort to reverse-engineer the firmware for these older Macs a much harder task than the effort needed to develop hacks/alternative bootloaders supporting APFS?
    Are there no retired Apple firmware engineers out there who could give advice, or is this a violation of Apple's IP? Is the firmware encrypted?
    What exactly is stopping hacking of firmware for older Macs?
     
  2. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #2
    This only worked because the hardware in the 2009 and 2010 Mac Pros was the same. There was no reverse engineering involved. People who want to run High Sierra on unsupported hardware are going to have to boot from HFS+ volumes.
     
  3. nekton1 thread starter macrumors 6502

    Joined:
    Apr 15, 2010
    Location:
    Asia
    #3
    Not necessarily, there is a way to boot APFS on these old Macs—it just has not been made widely public yet. But you'll find more on Macrumors if you look.
     
  4. Squuiid macrumors 6502a

    Squuiid

    Joined:
    Oct 31, 2006
    #4
    The 2010 Mac Pro IS supported however. We are still waiting to see what they're going to do about APFS. Perhaps there will be a firmware update. If there is, it very likely can be modded in the same way the previous update was to convert 4,1 to 5,1.
     
  5. nekton1 thread starter macrumors 6502

    Joined:
    Apr 15, 2010
    Location:
    Asia
    #5
    Old posts on InsanelyMac indicate firmware files for older Macs like the MP3,1 can be dumped and are not encrypted. We need an Apple firmware guru to modify them for the 3,1 and possibly 4,1 to add APFS support. Difficult and high potential for bricking the Mac too.
    I'm 99% sure the cMP 5,1 will get a firmware update to add APFS support in the coming weeks.
     
  6. applCore macrumors member

    applCore

    Joined:
    May 3, 2011
    #6
  7. nekton1 thread starter macrumors 6502

    Joined:
    Apr 15, 2010
    Location:
    Asia
    #7
    Used o3x zfs for years and found it to be good too but cannot use on a boot disk.
     

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