boot sequence mac/ ubuntu

[janhaex]

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.

[grahammechanical]

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.

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

[ActionParsnip]

Easy peasy

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.

[janhaex]

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

[janhaex]

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.

[bobunderwood99]

https://linuxnewbieguide.org/how-to-...tosh-computer/

[ActionParsnip]

What is the output of:

ls /etc/grub.d/*

Thanks

[janhaex]

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

[ajgreeny]

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

[janhaex]

@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