Problems with EFI Boot

Discussion in 'Mac Pro' started by MriX, Nov 5, 2017.

  1. MriX thread starter macrumors newbie

    Joined:
    Oct 23, 2017
    Location:
    Germany
    #26
    Thanks for your detailed clarification!

    BootChamp executes exactly that bless command you wrote. That works pretty well with disabled SIP.

    The problem is that Apple hasn’t developed an APFS driver for Windows.
    So the „Restart in OS X“ function does not work as stated in this support article: https://support.apple.com/en-us/HT208123

    Apples workaround is to use the ALT-key method, but this does not work for me, because I have a PC graphic card and cannot see the boot menu.

    Do you mean the info.plist file for the Bootcamp App in macOS?
    There is also the Apple Software Update Tool in Windows, which should search for Bootcamp/driver updates. In the past I used a MacBook Air 2014 to get the driver for the Magic Trackpad 2 and Magic Keyboard, because these drivers were only rolled out via this mechanism and are not included in the Bootcamp Driver USB Stick.
     
  2. MriX thread starter macrumors newbie

    Joined:
    Oct 23, 2017
    Location:
    Germany
    #27
    Now I archieved that BootChamp only boots once to Windows.

    Steps:
    —> Install original graphics card in the Mac
    —> PRAM reset
    —> disable SIP again
    —> boot with BootChamp in Windows
    —> ALT-key and select Mac Volume
    —> set your Mac Volume as startup disk
    —> put back your new PC graphics card
     
  3. MIKX macrumors regular

    MIKX

    Joined:
    Dec 16, 2004
    Location:
    Japan
    #28
    I gave up on Bootcamp .. . there were too many unexplainable glitches especially at times when I really had to be running Windows for business at that exact moment.

    I resorted to having first Win 7 and recently Win 8.1 clean installs on dedicated hard drives.
    The most crucial part of the WIN installations was first installing the correct "basic" graphics card driver - in my case - for an HIS HD 7950 which does not have Win 8.1 drivers on the supplied Drivers DVD. I downloaded the correct driver from AMD's site and after a re-boot, no problems .

    I have not ever needed to install Bootcamp drivers - so far everything, keyboard, mouse, WiFi, Bluetooth .. all work.

    I use DropBox to swap files around.

    Of course a correctly running Bootcamp setup is very desirable for most users but I'm happy just to have a reliable 100% working Win 8.1 for the times I absolutely need it. Which is rarely thank God.
     
  4. DearthnVader macrumors 6502

    DearthnVader

    Joined:
    Dec 17, 2015
    Location:
    Red Springs, NC
    #29
    I was unaware that there is no APFS driver for Windows, having to Alt-boot to get back to the macOS is very un Apple like solution.

    There is a thread around here about using a modified rEFId to load the GOP rom and give boot displays on PC graphics cards. That really sound like the best bet, when I get home Sunday I'll see is I can compile the patched version of rEFId and post a link to it on my google drive.
     
  5. h9826790 macrumors 604

    h9826790

    Joined:
    Apr 3, 2014
    Location:
    Hong Kong
    #30
    I am also interested in this project, however, I know extremely little about how to compile software. If there is anything I can help. e.g. You need some tester. Please let me know. As long as have proper instruction. I should able to follow it and assist you a bit.
     
  6. MriX thread starter macrumors newbie

    Joined:
    Oct 23, 2017
    Location:
    Germany
    #31
    Could you share a link to this project?
    A lot of my colleagues are software developers, so they could help me.
     
  7. DearthnVader macrumors 6502

    DearthnVader

    Joined:
    Dec 17, 2015
    Location:
    Red Springs, NC
    #32
    Once I compile it, I'll post a link for everyone, it builds in Linux, and I'm on the road with only my Chromebook(Arm). I have a full Linux install on my Chromebook, but I'm not sure how to setup a cross compiler for EDK2, so it will be Sunday before I'm able t start work on it. It's not too difficult to build, but EDK2 is a large download.

    Check the link below for build instructions, or wait till I can post the precomplied binary.




    https://sourceforge.net/u/jief7/refind/ci/master/tree/

    That's the tree with the modified GOP loader, I haven't tested it myself, but the build seems pretty straight forward.
     

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