My MacBook Pro 16-inch, 2019
Processor 2.4 GHz 8-Core Intel Core
macOS Sequoia 15.1
I want to create an external boot disk that I can boot form, clean install all my apps etc, erase the MacBook Disk and migrate the new clean system back....
I have created a bootable disk with macOS Sequoia 15.1, but when I try to boot from the external disk I get
How do I get around this?
MacBook Pro 16″
I don't know if you configured your Mac to allow it.
If you're using a Mac with the Apple T2 Security Chip, use Startup Security Utility to allow your Mac to start up (boot) from external or removable media. Learn how to use Startup Security Utility.
I don't know if you configured your Mac to allow it.
If you're using a Mac with the Apple T2 Security Chip, use Startup Security Utility to allow your Mac to start up (boot) from external or removable media. Learn how to use Startup Security Utility.
Timothy Holt wrote:
Haha. Ok. Be patient. Despite having been an Apple user since 1984, I am now older and struggling to keep up with changes.
It's an Intel Core processor. Is it a Mac with the Apple T2 Security Chip?
Dunno.
Your Mac has the T2 security chip. You will need to follow the instructions in the link provided earlier to enable booting from an external drive.
That looks like you may have a firmware lock on your Mac. You would need to enter the firmware password.
Haha. Ok. Be patient. Despite having been an Apple user since 1984, I am now older and struggling to keep up with changes.
It's an Intel Core processor. Is it a Mac with the Apple T2 Security Chip?
Dunno.
This is getting a bit beyond my knowledge. It looks like you are asked to enter the disk encryption password. Normally, this should be your user password but I can’t be sure (I don’t have a T2 equipped Mac to test.)
Hopefully, a more knowledgeable contributor will intervene in this discussion to bring you definitive answers.
Well. I will do that when I can access Mac Help.
In the meantime, apple is sending your helpful replies 3 times for each response...
go figure...
Tks. I will follow your advice. This MacBook has been a lemon since I bought it. @OSDVNAO D;sdf. 9
Sorry - the keyboard went south and I had to reboot...
I followed the instruction, and changed the setting to allow booting from external disk.
no luck.
am trying to go back using Command R, but cannot get past this screen.
Can't boot from External drive
