Release the key when you see the boot menu displaying your available drives. Select the drive and press Enter.

Before downloading, ensure your Mac hardware supports version 10.13.6. Late 2009 or newer MacBook Air / Pro: Late 2010 or newer Mac mini / iMac: Late 2009 or newer Mac Pro: Mid 2010 or newer Memory: Minimum 2 GB RAM (4 GB recommended) Storage: At least 14.3 GB of available storage space Step 1: How to Download the Official macOS High Sierra DMG

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Select or System Preferences > Software Update .

Additionally, 64-bit applications that may not run on Catalina or newer versions function flawlessly on High Sierra, making it a favorite for creatives and professionals with specific software needs.

After the installation completes and you set up your user account, verify that everything is up to date: Go to the in the top left corner.

sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume

Disclaimer: This guide is for educational purposes. Always back up your data before installing any operating system. Why Download macOS High Sierra 10.13.6?