[jazzyjackson]

Yes I’m really impressed with how nicely the installer works and able to choose on boot. Brings me back to my boot camp days of triple wielding. Maybe someday now that windows is on arm…

I think I read a blog of theirs to the effect that the apple developers clearly made a choice to leave the opening in the secure boot chain to allow for a separate partition to install, giving them a hat tip, it would have been easy to lock out alternate OSes (Windows secure boot with bitlocker does) but Apple lets you have it both ways.

I word of warning for others - I did manage to fubar my install when I wanted to undo it, I didn’t pay enough attention and deleted a partition I wasn’t meant to and got in a boot loop. Following recovery to reinstall macOS worked fine, just had to blow away my macOS partition, so, you know, back it up if you don’t want to lose it :)