MP 4,1 Dual boot after High Sierra?

Discussion in 'Mac Pro' started by Supermacguy, Feb 14, 2018.

  1. Supermacguy macrumors 6502

    Joined:
    Jan 3, 2008
    #1
    I've got a MacPro 4,1, already updated firmware to 5,1 firmware. Runs great.
    If I upgrade to High Sierra, it wants to update my firmware to the HS version.

    Can I still multi-boot to Sierra after this firmware updating? Are there any other multi-boot issues after HS update?
     
  2. casperes1996 macrumors 68040

    casperes1996

    Joined:
    Jan 26, 2014
    Location:
    Horsens, Denmark
    #2
    As I'm aware, the firmware update is only to add support for APFS, and for all other machines anyway, dual booting to Sierra or any other OS is still possible
     
  3. haralds macrumors 6502a

    haralds

    Joined:
    Jan 3, 2014
    Location:
    Silicon Valley, CA
    #3
    Correct. I can boot back to Lion.
     
  4. Supermacguy thread starter macrumors 6502

    Joined:
    Jan 3, 2008

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