- May 29, 2013
- Gigabyte Z390 M Gaming
- i9-9900K OC'd @ 5.0GHz
- Vega 56 (Bios flashed to 64)
- Classic Mac
- Mobile Phone
Not tried this. How to do it ?
I haven't tried, but the follow should work...
1. Start with a USB flash drive large enough for multiple macOS installers. 32GB should be sufficient for four versions of macOS.
2. Plug flash drive in to your computer.
3. Launch Disk Utility.
4. Initialize the flash drive in to four partitions of equal size. (name as untitled1, untitled2, untitled3, untitled4)
5. Download the versions of macOS installer you want. (i.e., Big Sur, Catalina, Mojave, High Sierra)
6. Launch Terminal and enter:
For Big Sur:
sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled1
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled2
sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled3
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled4