Cause: Corrupt DMG or incompatible USB port.
Fix: Re-download the DMG using the softwareupdate command. If using a Mac Pro (2010-2012), ensure the USB drive is plugged into a USB 2.0 port (not 3.0) during boot.
If you downloaded the DMG specifically for a VM (like VirtualBox on a Windows PC): download+macos+high+sierra+10136+dmg+mac+install
High Sierra converts SSDs to APFS automatically. If the install hangs at "Converting to APFS": Cause: Corrupt DMG or incompatible USB port
The specific build number (10.13.6) is the final version of High Sierra. Users typically look for this exact DMG for three reasons: High Sierra converts SSDs to APFS automatically
Apple no longer lists High Sierra in the "Purchased" tab of the App Store for new Apple IDs. However, the direct link still works:
