Trying to boot to a external hard drive using my M1 Max MacBook Pro

[bige12]

I have a 2021 16 inch Macbook Pro with the M1 Max chip, I'm trying to boot to a external hard drive, I hold the power button and it shows up as a driver but when I click on the drive than click continue it dose nothing - and if I change the startup disk it says the macOS needs to be updated - I did that and it still did not work- should I just erase the drive and start over or what should do?
I'm getting this error message.

 

[Fishrrman]

Did you create the bootable external drive using the 2021 MBP?

If so, how did you do it?
- CarbonCopyCloner?
- SuperDuper?
- Fresh OS install onto the external drive?
- Something else?

 

[chabig]

Follow these good instructions:

Creating a bootable external disk with an M1 Pro in Monterey

Want to create a bootable external disk for your M1 Mac? Here’s how to do it in full detail, from erasing the volumes through to how to remove it safely.

eclecticlight.co

 

[bige12]

Did you create the bootable external drive using the 2021 MBP?

If so, how did you do it?
- CarbonCopyCloner?
- SuperDuper?
- Fresh OS install onto the external drive?
- Something else?

I created MacOS Beta external drive on a 13 inch intel MacBook Pro - I was trying to see if I could get it to boot on a M1 Max MacBook Pro

 

[Fishrrman]

"I created MacOS Beta external drive on a 13 inch intel MacBook Pro - I was trying to see if I could get it to boot on a M1 Max MacBook Pro"

My guess is ... NOT going to work.

Try again.
This time, use the 2021 MBP as "the Mac you do the creating from..."

 

[bige12]

It is a lot harder to create a bootable drive on a M1 Mac since you have to give it authorization

 

[Fishrrman]

I don't have an m-series Mac (yet).

But in order to boot from an external drive, don't you need to do this first?
- boot to the recovery partition (or whatever the m-series uses in lieu of that)
- open a utility there called "startup security"
- DISABLE security so that the Mac can be booted from an external drive
????