Can't Boot Into High Sierra After Ubuntu Install

[bogof]

Hi all,

I'm looking for some advice on how to fix my setup, I did have High Sierra running perfectly and pretty disappointed to have broken my setup. I have installed Pop_OS(Ubuntu) on a separate drive and can no longer boot OSX from USB or SSD. I can boot into clover from USB but it no longer shows my OSX partition as a boot option and clover will not boot at all from my hard drive.

Here is an image of efibootmgr

https://imgur.com/IMCVSAj

I have OSX on /dev/sda and Ubuntu on /dev/sdb

In Gparted for both drives I have:

https://imgur.com/xKMbEDH

https://imgur.com/cNUdRAP

And the mounted folder for the sda EFI partition shows the usual files.

https://imgur.com/e3SgRXx

Could anyone please advise how I can go about fixing this please?

All images on imgur as I couldn't upload them..

[MaLd0n]

[ref]bogof[/ref], https://Olarila.com/forum/viewtopic.php?t=3405