Sierra 10.12.4 on Mac Pro 4.1->5.1?

Discussion in 'Mac Pro' started by SteveJobzniak, Mar 29, 2017.

  1. SteveJobzniak macrumors 6502

    SteveJobzniak

    Joined:
    Dec 24, 2015
    #1
    Sierra 10.12.4 contains firmware updates for a lot of Macs.

    Is it safe to install 10.12.4 on a Mac Pro 4.1 that has been previously flashed to 5.1 to run modern CPUs?

    Just wanna be sure there isn't a sudden incompatible firmware update that bricks my machine.
     
  2. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #2
    Once flashed, it's a real 5,1. The firmware is identical as the real 5,1. As long as Apple says 10.12.4 officially support the real 5,1. You flashed 5,1 will be fine.

    Anyway, I did the update already, it's safe.
     
  3. Synchro3 macrumors 65816

    Synchro3

    Joined:
    Jan 12, 2014
    #3
    Would be funny if Apple releases a firmware update for Mac Pro 5,1 in 2017. :D

    But no fear, MP 5,1 is on the ignore list.
     
  4. DPUser macrumors 6502a

    Joined:
    Jan 17, 2012
    #4
    I have updated two 4,1>5,1 Mac Pros to 12.4 successfully.
     
  5. theitsage macrumors 6502a

    Joined:
    Aug 28, 2005
    #5
    The Mac Pro towers have no firmware issues in 10.12.4. Late 2016 MacBook Pro is one seeing the most changes. The firmware upgrade on these Thunderbolt 3 MBP effectively breaks AMD compatibility for eGPU.
     
  6. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #6
    10.12.4 doesn't update the firmware on any Mac Pro older than the late 2013 model, so there's no concern.
     
  7. joebclash macrumors regular

    Joined:
    Jun 14, 2016
    #7
    How nice of apple to do that. Does apple hate their users?
     
  8. theitsage macrumors 6502a

    Joined:
    Aug 28, 2005
    #8
    My guess is Apple doesn't like a disruption to its Mac lineup hierarchy. I've recently tested the $80 RX 460 2GB in an eGPU enclosure. The RX 460 eGPU is running faster than Radeon Pro dGPUs in Late 2016 15" MBP.

    Screen Shot 2017-03-29 at 11.04.43.png
    rx-460-akitio-node-egpu-vs-radeon-pro-460.jpg
     
  9. ActionableMango macrumors 604

    ActionableMango

    Joined:
    Sep 21, 2010
    #9
    Does anyone know what the firmware update does? I looked at Apple's firmware update pages but the latest entry for the 2013 Mac Pro is the old firmware update from October 2015. This new one is not listed yet.

    Yes, but only those of us who upgrade and extend the useful life of our computers.

    I'm sure Apple loves the users that buy a new computer every year.
     
  10. chrfr macrumors 603

    Joined:
    Jul 11, 2009
    #10
    It most likely has some security fixes for some computers, and also changes how internet recovery works: https://support.apple.com/HT204904
     
  11. SteveJobzniak thread starter macrumors 6502

    SteveJobzniak

    Joined:
    Dec 24, 2015
    #11
    Thanks everyone for all the answers! I will be upgrading. :)
     
  12. Jayson A macrumors 68000

    Joined:
    Sep 16, 2014
    #12
    If someone flashes a 4,1 to a 5,1 is there any way to tell if it has ever been a 4,1 Mac? I just bought a 5,1 on eBay and I wanna know if I got a "real" 5,1 or if it's a 4,1 that has been flashed.
     
  13. owbp macrumors 6502a

    owbp

    Joined:
    Jan 28, 2016
    Location:
    Belgrade, Serbia
    #13
    @Jayson A , In System Report Serial Number and SMC Version cannot be changed.
    In About This Mac it should say what year and model it is but it can be easily changed.
     
  14. CapnDavey macrumors 6502

    CapnDavey

    Joined:
    Apr 11, 2015
    #14
    If you computer say its an early 2009 mac pro its a 4,1 upgraded
     
  15. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #15
    There is a little sticker at the back of the Mac Pro (near the bottom PCIe slot, should be just below your graphic card's port). It should say model number A1289. If the EMC is 2629, that's a real 5,1. For 4,1, the EMC is 2314.

    iss1188-apple-mac-pro-a1289-12-core-266ghz-2tb-8gb-os-x-1010-yosemite-office-6.jpg

    Check the SMC version is also a reliable way. A "flashed 5,1" will show 1.39f5.
    Screen Shot 2017-04-03 at 06.00.48 copy.jpg

    However, don't trust the info in "About this Mac", that's totally editable. To make it shows Mid 2012 is easy, In fact, you can make it shows something like this.

    MacNes.jpg
     
  16. Jayson A macrumors 68000

    Joined:
    Sep 16, 2014
    #16
    Thanks for the info! I knew you could manually change the system info plist. I've done it in the past to get around software installer blocks.
     

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