Your Mac will open the preference pane and begin downloading the file.
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Turn on the Mac and immediately press and hold the key. Release the key when you see the Startup Manager screen.
No. macOS High Sierra only supports older Intel-based processors. Apple Silicon Macs cannot run operating systems older than macOS Big Sur. Why does Terminal say "Command not found"? download macos high sierra 10.13.6 dmg mac
The complete Install macOS High Sierra.app is still available directly from Apple's servers. The most straightforward way is to open the Mac App Store on a compatible Mac and search for "macOS High Sierra," or use the official link:
If the App Store blocks your download because your current Mac is "too new," Apple provides direct download links for older macOS installers outside the App Store interface.
Apple provides a direct link to the Mac App Store page for High Sierra: Your Mac will open the preference pane and
On some newer macOS versions, the createinstallmedia tool inside the High Sierra installer might be terminated immediately by security policies. If this happens, you must remove the code signature from the tool before running it:
Select the drive named using the arrow keys, then press Enter .
On newer Macs, this may open the "Software Update" pane in System Settings. Confirm the download there. Once finished, the installer will be in your Applications folder, named Install macOS High Sierra Apple Support Community 2. Download via Terminal (For macOS 10.15+) Why does Terminal say "Command not found"
Turn on the Mac and immediately press and hold down the key.
sudo codesign --remove-signature /Applications/Install\ macOS\ High\ Sierra\ 10.13.6_17G66.app/Contents/Resources/createinstallmedia