Michael wrote: > Yes, there's one that will force your boot drive to APFS. So if you need to > use older systems (I have 32 bit programs that have no 64 bit replacement. I > use Jack Router when streaming and recording.), that means that at least a > significant portion of your system and home directory/files will be forced > into a drive that cannot be shared (and it seems that the newer the system, > the tighter the sandbox/the less you can put outside of /Users/<username> or > on a second partition.)
I have 10.15 and 10.14 (for some apps that are 32-bit only) installed on the same machine, and I didn’t even need to think about partitions, because storage space is shared across APFS volumes: https://support.apple.com/en-us/HT208891 Nils.
