[Current Date] Subject: Legacy OS Installation – macOS 10.13 High Sierra
If Terminal intimidates you, use (free) or Install Disk Creator – both apps have simple interfaces that automate the above command.
When the macOS Utilities window appears, select and click Continue .
Before downloading the installer, ensure your Mac hardware supports macOS High Sierra. Late 2009 or newer MacBook Air: Late 2010 or newer MacBook Pro: Mid 2010 or newer Mac mini: Mid 2010 or newer iMac: Late 2009 or newer Mac Pro: Mid 2010 or newer Memory: Minimum 2 GB of RAM (4 GB recommended) macos high sierra download dmg install
Your Mac will restart automatically to complete the process. Troubleshooting Common Errors
For Macs equipped with all-flash internal storage, High Sierra automatically converts the file system from HFS+ (Mac OS Extended) to APFS during installation. This conversion is automatic and nondestructive, but it means that once a Mac is upgraded to High Sierra, downgrading to an earlier macOS version becomes more complicated.
: Disconnect your Mac from the internet. Open Terminal from the installer menu and change your system clock to a date closer to the OS release window (e.g., October 2017) by typing date 1025000017 and hitting Enter. Quit Terminal and restart the installation. "An error occurred while validating the installer data" [Current Date] Subject: Legacy OS Installation – macOS 10
Here are some tips and tricks to keep in mind when downloading and installing macOS High Sierra:
Click the tab and locate macOS High Sierra 10.13.6 .
If the App Store link fails, use this direct Apple CDN link (copy carefully): https://updates.cdn-apple.com/2019/cert/061-39476-20191011-4a2c2d41-15a7-4bcb-97d5-a81e29f492ef/InstallMacOSHighSierra.pkg Late 2009 or newer MacBook Air: Late 2010
Follow the on-screen instructions. This ; it merely unpacks and places the Install macOS High Sierra.app utility directly into your local /Applications directory. 4. Step 3: Create a Bootable USB Installer
When downloading macOS High Sierra, you may encounter three different file formats. Understanding the differences will help you choose the right one for your needs.