DiskWarrior 5.2 is compatible with macOS 10.13 High Sierra and macOS 10.14 Mojave when rebuilding external drives. Mac OS Extended (HFS Plus) disks can be rebuilt as before. The internal drives of Macs are automatically converted from Mac OS Extended (HFS Plus) to Apple File System (APFS) when upgrading to macOS 10.14 Mojave. Only internal SSD drives are converted to APFS by macOS 10.13 High Sierra. DiskWarrior 5.2 now runs within macOS 10.14 Mojave Recovery.The Preview application in DiskWarrior can now copy files to APFS disks when recovering data from a failing Mac OS Extended (HFS Plus) disk. In Mojave, Time Machine disks must now be rebuilt from macOS Recovery or the DiskWarrior Recovery flash drive.