Open Terminal and paste the following command: sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/MyVolume
Press , type your admin password, and wait for the process to finish. Step 4: Installing macOS High Sierra macos high sierra download dmg install
Before downloading, ensure your Mac supports macOS High Sierra. Generally, the following models are compatible: Late 2009 or newer MacBook Air/Pro: Late 2010 or newer iMac: Late 2009 or newer Mac Mini/Pro: Mid 2010 or newer Open Terminal and paste the following command: sudo
Once your bootable drive is ready, follow these steps to install the OS: High Sierra introduced the , which significantly improved
Select your internal startup disk (usually labeled "Macintosh HD") and click .
High Sierra introduced the , which significantly improved file speed and security for SSD users. It is also the last version of macOS to support many 32-bit applications reliably, making it an essential OS for users running older professional software suites.
Use Time Machine or an external drive. A clean install will wipe your current data. Boot from USB: Plug the USB into the Mac. Restart the Mac while holding the Option (Alt) ⌥ key.