Hello, I am using MacOS Mojave on my MBP 15" mid 2015. Before installing MacOS I formatted the drive to HFS+ in disk utility, but after installation the drive is formatted as APFS. I have repeated the installation several times and I always have APFS. Don't know why the drive is after installing Mojave formatted to APFS? Can APFS disk file be changed to HFS+ after OS installation? Thanks.