startup – Rename EFI boot entries (MacBook Air)

I am unable to determine methods to rename boot entries on a MacBook Air 2012, i.e. people who seem when holding alt throughout boot.

The issue was initially that my EFI Ubuntu set up might solely be booted with the boot entry known as “EFI Boot”, which wasn’t very descriptive, however I might stay with it. The present drawback is that since I put in OpenCore (a 3rd get together boot loader that permits Massive Sur on this Macbook mannequin) it changed the Ubuntu boot entry with its personal entry, which makes use of the identical title (“EFI Boot”). I am assuming this alternative occurred due to the title collision (?).

As I see it, step one of the answer would then be to change the title of the present “EFI Boot” entry (that begins OpenCore) in order that when I attempt to recreate the Ubuntu boot entry later the OpenCore entry will not get overwritten. I am unable to determine how to do that.

What I’ve tried

I’ve tried customizing a suggestion from Apple Neighborhood that suggested methods to do it for an Ubuntu .efi (after mounting the ESP):

sudo  bless  --folder  /Volumes/EFI/EFI   --file  /Volumes/EFI/EFI/OC/OpenCore.efi  --label  "OpenCore"  --shortform  --verbose

The above command succeeded (in Massive Sur), however had no discernible impact on the boot menu upon reboot.

Associated

I’ve additionally learn a number of ideas that I am struggling to make sense/use of:

1. One reply solely pertains to macOS (Monterey), and explains that its boot.efi resides on an APFS quantity. To me it seems that — on my machine — there is a boot.efi on my ESP (FAT32) in /System/Library/CoreServices, so I do not assume I could make use of that even when my purpose have been to rename an entry for macOS (which it is not).
2. One other reply suggests that you simply’d simply must rename the quantity an OS resides on, however I am not making an attempt to rename a boot entry similar to an OS on a specific quantity. Even when I have been, the reply implies mounting (?) a Linux filesystem as a quantity in macOS, which is not one thing that is available.
3. The third reply says that .VolumeIcons.icns needs to be on a Mac OS Prolonged formatted quantity, and the title of such a quantity will seem within the boot menu. I’ve no such volumes — solely FAT32 (ESP), APFS (Mojave, Massive Sur), NTFS (Home windows 10) and EXT4 (Ubuntu). I’ve a .VolumeIcon.icns on the ESP although. However I nonetheless cannot make sense of it for the reason that query asks about renaming a boot entry for Home windows, which I doubt is put in on Mac OS Prolonged. Even when it have been, the entry I need to rename does not have its personal quantity to the perfect of my data.