Is there any reference or overview to be found somewhere of how much disk space the various MacOS/OSX versions take up?
And also which disk format (HFS, APFS etc.) each OS uses.
I occasionaly need to run some software which doesn't run on my current OS (10.14 Mojave -which is the latest OS I can run on my mid-2010 Mac Pro, at least officially), and it would be great to dedicate a spare hard drive or SSD to multiple OSes so I can choose to boot into the required one whenever I need to run an "outdated/unsupported" app without too much hassle. Partition the drive into say 5 parts, then install 5 different MacOS versions on each of their own partition.
Obviously I also need to take into consideration the disk space needed for any apps running within a certain OS, and some work-space as well.
I suppose transferring the finished file(s) back to my regular working environment would be a matter of storing them on a user's "Public" folder, or are there other better ways to do it?
And also which disk format (HFS, APFS etc.) each OS uses.
I occasionaly need to run some software which doesn't run on my current OS (10.14 Mojave -which is the latest OS I can run on my mid-2010 Mac Pro, at least officially), and it would be great to dedicate a spare hard drive or SSD to multiple OSes so I can choose to boot into the required one whenever I need to run an "outdated/unsupported" app without too much hassle. Partition the drive into say 5 parts, then install 5 different MacOS versions on each of their own partition.
Obviously I also need to take into consideration the disk space needed for any apps running within a certain OS, and some work-space as well.
I suppose transferring the finished file(s) back to my regular working environment would be a matter of storing them on a user's "Public" folder, or are there other better ways to do it?