My 2016 MBP is running 12.6.7. But as I have some older software that won't run on OS12, I got an external drive, and I want to install Big Sur on it.
I managed to download the Big Sur installer (Apple does not make this easy). It's in /Applications. It will not open, as many have pointed out.
So, how do I install macOS Big Sur on an external drive when the boot drive is a later version?
MacBook Pro 13″, macOS 12.6
You would need to create a bootable installer of Big Sur, boot your Mac from it, then select the external drive and install.
You would need to create a bootable installer of Big Sur, boot your Mac from it, then select the external drive and install.
One more question: I have a 1TB external drive. Can this external volume become the bootable drive- and also install Big Sur on the same volume?
I do know how to use Terminal, at least in a basic way.
Thank you.
You're welcome. As far as the second question, no, you would need a separate drive. A 16GB USB flash drive would be fine.
Well, not having one at hand, I'll try making a partition on the external drive, and see if that will serve.
Install BigSur on external from Monterrey startup?
