Can't boot install on MacbookPro 2,2

[ubumate]

Hello,

I need some help getting UM 21.10 usb installer recognized as a bootable drive. Right now, when loading the boot options, only the already installed MacOS HD is listed.

I used Disk Writer to write to thumb drive, and I verified that it's correct.

Here are the EFI files:

/EFI/boot/bootx64.efi
/EFI/boot/grubx64.efi
/EFI/boot/mms64.efi

Here is the drive layout after writing the image:

I do notice that the EFI path and file names are /EFI/boot/bootx64.efi, and I think I saw someplace that Macs look for /EFI/BOOT/BOOTX64.efi. Could the alpha-case be the issue?

[mdd12]

I believe that model of Mac has a 32 bit EFI and requires additional steps to install the OS. There is a thread on this site that addresses a solution though I don't have it at hand.

I recommend searching for it or someone else may be able to give you a link.

Best of Luck

[mdd12]

Here it is:

64-bit Ubuntu MATE images for 32-bit EFI Macintosh Computers

For those of us with older Intel based Mac computers you might have come across the fact that the 64bit ISOs will not boot on these machines leaving you stuck at a black screen that you can't select boot 1 or 2. I have made the following ISOs for Ubuntu MATE 64bit that will boot and install without this issue. The machines this should work on are: iMac 5,1 – iMac 5,2 – iMac 6,1 Macbook 2,1 MacBook Pro 2,1 – MacBook Pro 2,2 Mac Pro 1,1 (only one I can test) If you're interested in how I did…

[ubumate]

That did the trick. Thanks!