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Create an ISO from the mojave installer app
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| #!/bin/bash | |
| # This assumes that the ~10GB Big Sur installer is in the /Applications folder. | |
| hdiutil create -o /tmp/bigsur.cdr -size 10g -layout SPUD -fs HFS+J | |
| hdiutil attach /tmp/bigsur.cdr.dmg -noverify -mountpoint /Volumes/InstallBigSur | |
| # You need to manually erase the new volume in Disk Utility otherwise the next command will fail | |
| # The use of /Volumes/untitled is deliberate, because that's what its name will be after the preceding commands | |
| # Not sure why that is | |
| sudo /Applications/Install\ macOS\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/untitled | |
| mv /tmp/bigsur.cdr.dmg ~/Desktop/InstallSystem.dmg | |
| hdiutil detach /Volumes/Install\ macOS\ Beta | |
| hdiutil convert ~/Desktop/InstallSystem.dmg -format UDTO -o ~/Desktop/bigsur.iso | |
| mv ~/Desktop/bigsur.iso.cdr ~/Desktop/bigsur.iso | |
| rm ~/Desktop/InstallSystem.dmg | |
| # Now there should be an ISO on your desktop called bigsur.iso |
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