To install macOS High Sierra, your system must meet these minimum specifications:
Connect your USB drive (named "MyVolume" for this example) and open Terminal. Paste this command:
Are you looking to install this on a , or are you trying to set it up in a Virtual Machine ?
Click . The Mac will copy files and restart several times. Do not unplug the USB drive or turn off the computer during this phase. 5. Troubleshooting Common Installation Errors macos high sierra download dmg install
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.
For older Macs, Apple offers disk image (.dmg) files. Double-click the .dmg, then the .pkg inside to place the "Install macOS High Sierra" app in your Applications folder.
To perform a clean install, you must create a bootable USB installer. You will need a USB flash drive with at least . Format the Drive: Open Disk Utility . Select your USB drive and click Erase . Format: Mac OS Extended (Journaled) . Scheme: GUID Partition Map . Name the drive: MyVolume . Use the Terminal: To install macOS High Sierra, your system must
Before we dive into the download, let’s establish why you’d want High Sierra instead of Mojave, Catalina, or Monterey.
If you specifically need a .dmg file for virtualization (like VirtualBox) or deployment, you can use the hdiutil command in the Terminal to convert the .app installer into a disk image. Step 3: Create a Bootable USB Drive
mdls /Applications/Install\ macOS\ High\ Sierra.app | grep kMDItemVersion The Mac will copy files and restart several times
Open Disk Utility , select your USB drive, and erase it using the Mac OS Extended (Journaled) format and GUID Partition Map . Name the drive "MyVolume".
Older third-party SSDs sometimes reject the automatic transition to the APFS file system during setup.
: You can often find a direct link on the Apple Support page that opens the App Store directly to the High Sierra download page.
Once your bootable drive is ready, follow these steps to install the OS: