If your current Mac version (like Monterey or newer) blocks the direct download from the App Store, you can use a utility called Download Mist : You can find the tool on its official GitHub releases page Select High Sierra
Apple provides a dedicated support page for downloading older versions of macOS. download+macos+high+sierra+10136+dmg+mac+install
Twenty-two minutes of quiet. Her cat jumped onto the desk and curled around the warm monitor. Outside, a delivery truck reversed down the street. No notifications. No “We’ve updated our privacy policy.” If your current Mac version (like Monterey or
Result: Downloads Install macOS High Sierra.app to /Applications . download+macos+high+sierra+10136+dmg+mac+install