- Joined
- Apr 12, 2021
- Messages
- 903
- Motherboard
- Asus z590 ROG Maximus XIII Hero
- CPU
- i9-11900K
- Graphics
- RX 6600 XT
- Mac
- Classic Mac
- Mobile Phone
I assume you are working to create an installer so you can resolve the issue you describe on this concurrent thread.These instructions don't match what I'm experiencing. I inserted the USB drive and opened Disk Utility. The Partition tab is greyed out. If I click on the Erase tab I can format as MacOS Extended (Journaled) or two other options. It also asks for a Scheme, but there is NO "GUID Partition Table". There is Guid Partition Map. Since I don't know what these things mean, multiple discrepancies in the instructions cause anxiety.
Also there's no indication of whether there is a minimum or maximum size recommended for the USB.
My backup isn't showing up in the picker. I tried running Disk Utility First aid, and got the error, "The partition map needs to be repaired because there's a problem with the EFI system partition's file system. : (-69766)"
If you've never populated the backup drive with a macOS bootloader, it won't appear to the BIOS.
CCC doesn't copy the source drives EFI folder to the new drive's ESP.
The Disk Utility error may be a red herring.
While having a bootable macOS drive handy is always a good thing, you might be working too hard in this case.
Also, if you truly do need to fix drive structure on a non-boot drive, you don't need to boot an alternate macOS.
Please read my response on the other thread for more info on fixing the ESP.
If what you need is just to copy your source drives EFI over to the ESP of the backup, you are going down a needless path.
But having a bootable macOS USB drive is handy for future contingencies