- Joined
- Sep 21, 2010
- Messages
- 13,411
- Motherboard
- HP 17" 17-by3053cl
- CPU
- i5-1035G1
- Graphics
- Intel UHD Graphics, 1920x1080
- Mac
- Classic Mac
- Mobile Phone
macOS doesn't boot from some external drives. I doubt it will be available to select it in the BIOS, as well.Made a backup with CCC and copied manually the EFI folder on an external FireWire drive.
How can I boot from THIS drive, to make sure everything is working? Using the pref pane startup disk doesn't work. Neither the Clover menu. There, the ext. HD didn't show up.
You may have to make the backup drive available as a USB drive. Do you have a USB case to test it? Otherwise, take the drive out of the FW case and install it internally; then you will be able to boot it.