macOS High Sierra – determining file system used on the disk, in Installer or Rescue Mode

macOS High Sierra - determining file system used on the disk, in Installer or Rescue Mode

To determine which filesystem is installed on the disk, while in Installer, open Terminal From “Utilities” menu and type the following:

mount

A large list of virtual disks will be presented. You have to find “/Volumes/name_of_your_partition” (for example /Volumes/MacintoshHD or /Volumes/mydisk) in on the list and check the first word in brackets in that line. In this case the partition is simply called “HFS” and is mounted as “/Volumes/HFS”. “HFS” here is not the type of filesystem, it’s just a name of the partition. The thing you are looking for is the first word in the brackets: lowercase “hfs”. In this case the filesystem used is HFS+.

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

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

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