[SOLVED] BOOT ERROR - EFI Macbook Air with 23.10 on external drive/Mac O/S on internal

[spiderman]

Okay just to do a recap on what actually happened, I plugged in a 256 GB solid state disc into my Apple MacBook Air running KUbuntu 23.10. I booted to a Kubuntu install disc, and I installed Kubuntu onto the 256 GB external disc attached to the Macbook with the internal 128GB drive. After that, the MacBook Air would not boot to the original disc / operating system on the internal drive without the external drive plugged in...this is also noted here in a post... link: https://www.kubuntuforums.net/forum/...oard-hard-disc

I went through the process to fix the boot track on the MacBook Air [noted in the link above]. So now that MacBook Air boots to its own original drive W/ 23.10, however the 256 GB drive with KUbuntu on it will not boot. So I took my Active Boot Disc drive cloning software & I took that program and cloned a working EFI boot drive. I used that to install an EFI boot partition on the hard drive. It's about 512 MB. (I duplicated the EFI drive on the 128 GB EFI track to the 256 because the original install put an empty EFI disc there.) Photo's here:

Attempted Boot on Macbook Air with Mac O/S before cloning EFI: https://photos.app.goo.gl/kfcZEDzLgDQoYnYC8 {File below is MacO-S} Boot with EFI Cloned: https://photos.app.goo.gl/3qTKpiqwKC1Kjvdx9 {File is EFInMacO-S} Grub Error: https://photos.app.goo.gl/yrB3FVi743kmTo197 {File is GruberrorPxl} Grub error: " ' Minimal BASH – like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device or file completions. To enable less(1)-like paging, "set pager=1". Grub> ' "

After looking at the GRUB error, My question is, What is my next step to get this drive to boot on it’s own?

[Stefanso]

I see that you have no help here. I don't have any terminal script knowledge or understanding on how to edit GRUB.2. Looks like such knowledge would help you out, but I did get to use a software package that worked on a similar problem. Back up your drive or even clone it to another USB and try this: boot-repair-disc @ https://sourceforge.net/projects/boot-repair-cd/ ...

[spiderman]

AWESOME! TYVM, yeah I wanted to solve this by learning how to do this from the terminal, but since no one gave suggestions, I realy appreciate your input. It works great. Got to run the upgrade to 24.04 and updated it. Now I am going to clone it for a backup...