01-26-2022, 06:24 PM
High Sierra doesn't (by default) do a clean install. It does the APFS file conversion in place.
It is possible to run High Sierra on HFS+. That's how I ran it for all the years I used it. If you want to go that route, check and make sure the instructions you're reading are "current". My understanding is that it may not work with the latest installers (which are the only ones that work anyway since Apple "messed" up all their old installers. However, it's also possible to clone a High Sierra installation back to an HFS+ drive if needed.
It is possible to run High Sierra on HFS+. That's how I ran it for all the years I used it. If you want to go that route, check and make sure the instructions you're reading are "current". My understanding is that it may not work with the latest installers (which are the only ones that work anyway since Apple "messed" up all their old installers. However, it's also possible to clone a High Sierra installation back to an HFS+ drive if needed.