How to upgrade macOS to High Sierra without filesystem change (HFS+ to APFS)

During the installation of developer and beta versions of macOS High Sierra, user was asked if he/she wants to “upgrade file system to APFS”. With the final (17A365) version of High Sierra, such question is no longer displayed to people with systems on flash-only storage. It is however still possible to avoid filesystem conversion and install High Sierra on HFS+ filesystem, or keep HFS+. This is not a “you should”, it’s a “you can” This howto (hownotto) only shows how … Continue reading How to upgrade macOS to High Sierra without filesystem change (HFS+ to APFS)