Open and format the USB drive as Mac OS Extended (Journaled) with a GUID Partition Map . Name the drive Untitled .
https://support.apple.com/en-us/HT211683 macos high sierra 10136 dmg
Your Mac will verify the hardware compatibility and begin downloading the installer to your Applications folder as "Install macOS High Sierra.app". Converting the .app to a .DMG File Open and format the USB drive as Mac
The Internet Archive is a legitimate archival site, and the file they host is stated to be a direct copy from Apple. However, you should always verify the integrity of any downloaded installer from a third party. Check for the file's SHA-256 checksum in the description and compare it against other known safe sources, if possible. Converting the
The drive will be completely erased, so back up any existing files. Step-by-Step Terminal Guide Plug your USB drive into your Mac.
Select Install macOS from the main utilities menu, click Continue, accept the terms, and select your internal hard drive as the destination. Keep your Mac plugged into power during this process. Common Troubleshooting Tips