We will be creating dual boot for OS X and Linux with no special boot loader. For other setup, refer to [1]. We will keep all data on an external hard drive, so we do not need huge amount of space for the linux system. We will install from an USB thumb drive (will need at least 1GB in size), newer Minis do not have CD roms.
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# Generate a BaseSystem.dmg with 10.13 Install Packages | |
hdiutil attach /Applications/Install\ macOS\ 10.13\ Beta.app/Contents/SharedSupport/InstallESD.dmg -noverify -mountpoint /Volumes/highsierra | |
hdiutil create -o /tmp/HighSierraBase.cdr -size 7316m -layout SPUD -fs HFS+J | |
hdiutil attach /tmp/HighSierraBase.cdr.dmg -noverify -mountpoint /Volumes/install_build | |
asr restore -source /Applications/Install\ macOS\ 10.13\ Beta.app/Contents/SharedSupport/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase | |
cp -R /Volumes/highsierra/Packages /Volumes/OS\ X\ Base\ System/System/Installation | |
hdiutil detach /Volumes/OS\ X\ Base\ System/ | |
hdiutil detach /Volumes/highsierra/ | |
mv /tmp/HighSierraBase.cdr.dmg /tmp/BaseSystem.dmg |