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Thread: boot sequence mac/ ubuntu

  1. #1
    Join Date
    Sep 2021
    Beans
    5

    boot sequence mac/ ubuntu

    Hy everybody,

    I just installed Ubuntu 20.04 in dual boot on my iMac 27" mid 2011 (Mac OS High Sierra). But now it always automatically starts up in Ubuntu, unless I hit my option key, then I can choose between Ubuntu en Mac OS. Is het possible one way or the other to get that choice every time I power up my iMac without pushing that option key?

    Many thanks for your answers!



    Jan.

  2. #2
    Join Date
    Jun 2010
    Location
    London, England
    Beans
    Hidden!
    Distro
    Ubuntu Development Release

    Re: boot sequence mac/ ubuntu

    Just to confirm. When you first installed Ubuntu did you get a Grub boot menu that allowed you to choose between Ubuntu and Mac OS? Try running this command and see if the output mentions the Mac OS.

    Code:
    sudo update-grub
    P.S. The command will ask for a password. It is the password you choose during the Ubuntu installation process. Do not expect to see the password printed on the screen.

    Regards
    Last edited by grahammechanical; 3 Weeks Ago at 05:53 AM.
    It is a machine. It is more stupid than we are. It will not stop us from doing stupid things.
    Ubuntu user #33,200. Linux user #530,530


  3. #3
    Join Date
    May 2010
    Beans
    1,697

    Re: boot sequence mac/ ubuntu

    Easy peasy
    Code:
    sudo mv /etc/grub.d/30_os-prober /etc/grub.d/09_os-prober
    sudo update-grub
    The number in the file dictates the order, so if you make the number lower than the Linux file in /etc/grub.d then it appears earlier.

  4. #4
    Join Date
    Sep 2021
    Beans
    5

    Re: boot sequence mac/ ubuntu

    Hello grahammechanical,

    When I first installed Ubuntu, I didn't get the Grub boot menu.

    I used your commandline and got the following result:



    That "Initrd-schijfkopie", could this be the Mac OS?

    After the commandline, I restarted my iMac, but the Grub boot menu still doesn't show up.


    Kind regards,


    Jan
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  5. #5
    Join Date
    Sep 2021
    Beans
    5

    Re: boot sequence mac/ ubuntu

    Hello ActionParsnip,

    I also tried your commandline, but got the following error-message:



    Again I restarted my iMac, but still no Grub menu...


    Kind regards,


    Jan.
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  6. #6
    Join Date
    Jul 2021
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    25

  7. #7
    Join Date
    May 2010
    Beans
    1,697

    Re: boot sequence mac/ ubuntu

    What is the output of:
    Code:
    ls /etc/grub.d/*
    Thanks

  8. #8
    Join Date
    Sep 2021
    Beans
    5

    Re: boot sequence mac/ ubuntu

    Hello everybody,

    In the meanwhile I'm using rEFInd bootloader. After trying many different things in terminal, without the success I hoped for, i found rEFInd on SourceForge.net.

    I downloaded and installed it directly in Ubuntu, and after rebooting, it's working.

    Nevertheless, I wish to thank everyone wo helped me with his/her advice. For now this thread can be closed.
    Hope to meet you again in the future...

    Regards,


    Jan

  9. #9
    Join Date
    Jul 2005
    Location
    I think I'm here! Maybe?
    Beans
    Hidden!
    Distro
    Xubuntu 20.04 Focal Fossa

    Re: boot sequence mac/ ubuntu

    Thread moved to Apple Hardware Users. which is more appropriate and a better fit as most users know very little about Apple hardware.

  10. #10
    Join Date
    Sep 2021
    Beans
    5

    Re: boot sequence mac/ ubuntu

    @ActionParsnip
    I was too happy too soon rEFInd worked just for a few days.
    I got the following result inserting your commandline:



    But nothing further, no boot manager at restart;

    Regards,

    Jan
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