Now when I reinserted it I cannot get the Ubuntu desktop to load. To do all the experimenting, I had pulled out my Ubuntu 19.04 drive. I don't know what it means but it doesn't seem to affect the ability to boot Ubuntu. Initializing defaults." message whenever I select the EFI Boot option of the disk containing Ubuntu from the Mac's Startup Manager (hold the Option key at boot). I used iPartition.app in macOS to deselect the "Show in Windows" option for the HFS+ partition, which converts the disk back to GPT when no partition has the option selected (APFS partitions are unknown to iPartition and automatically have that option deselected -the option is not visible for APFS partitions). I have Ubuntu 18.04 LTS on the 7th partition and 20.04 LTS was installed to the 15th partition. The installer turned my GPT disk into a Hybrid GPT/MBR disk, placing the EFI partition and the first 3 other partitions (one HFS+ and two APFS) into the MBR. Is there any other place that could be pointing to the wrong EFI partition for Ubuntu boot? I used sudo efibootmgr -o XXXX,YYYY to restore macOS as the default boot (but it's probably better to do that in macOS with Startup Disk preferences app or the bless command). In the Ubuntu terminal, I used efibootmgr -v to check the boot variables, and sudo efibootmgr -B -b NNNN to delete the ubuntu option that was pointing at the wrong EFI partition (using the partition uuid).
In Ubuntu, I used the Disks app to change which EFI partition gets mounted to /boot/efi (identify by partition uuid). I manually moved the files from the BOOT folder and the ubuntu folder of the EFI partition to the same location on the EFI partition of the disk containing the Ubuntu partitions. It installed EFI files to the EFI partition of a different disk (I had selected the EFI partition of the same disk that has the Ubuntu root and swap partitions).
Can you load ubuntu on a mac software#
I reinstalled without third party software and without enabling auto login.