Building macOS installer disk images for virtual machines with create_macos_vm_install_dmg

A while back, I wrote a couple of scripts which built installers for Mac virtual machines:

• create_os_x_vm_install_dmg
• create_macos_vm_install_dmg

However, Apple made some changes to the macOS installer starting in macOS Sierra 10.12.4 which broke the method I was using to build the installers. Recently though, I figured out that I could use Apple’s createinstallmedia tool to help me with building installers for Mac virtual machines again. After a substantial re-write, create_macos_vm_install_dmg is able to create bootable disk images for virtual machines running macOS Sierra, High Sierra and Mojave.

One change from the previous version of the create_macos_vm_install_dmg script is that the resulting installer no longer runs an automated installation. Instead, it will be necessary to follow the prompts to select the language and drive to install the OS onto. For more details, please see below the jump.