pastrychef
Moderator
- Joined
- May 29, 2013
- Messages
- 19,458
- Motherboard
- Mac Studio - Mac13,1
- CPU
- M1 Max
- Graphics
- 32 Core
- Mac
- 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:
Code:
sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled1
Code:
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled2
Code:
sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled3
Code:
sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled4