I can provide the exact terminal commands or configuration settings for your setup. Share public link
If you need a .dmg file specifically:
It will be in /Applications/Install macOS High Sierra.app
Are you receiving any (like "installer payload signature verification failed")?
What you are installing this on?
Click or the download icon to pull the file into your /Applications directory. Method 2: Direct DMG/Pkg Download via Apple Servers
OS X Mountain Lion 10.8 or later to upgrade directly Official Methods to Download macOS High Sierra 10.13.6
Go to Applications > Utilities > Terminal.
This guide provides official download pathways, hardware compatibility lists, and a step-by-step walkthrough to create a bootable USB installer from your downloaded DMG file. Technical Specifications & System Requirements
If it says the version is "not compatible" with your current Mac, you may need to use a third-party tool like to fetch it directly from Apple's servers. 2. Download DMG/Updates from Apple Support If you already have High Sierra and just need the 10.13.6 Update Combo Update
Close Disk Utility, select , and follow the system setup instructions.
