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erase-install

by Graham Pugh

WARNING. This is a self-destruct script. Do not try it out on your own device!

erase-install.sh is a script to reinstall macOS directly from the system volume using startosinstall, which is built into macOS installer applications since version 10.12.4. The eraseinstall option was added with macOS 10.13.4.

It can be used to reinstall, upgrade or erase macOS.

The script is designed to interact with installinstallmacos.py, a script developed by Greg Neagle, in order to download a macOS Installer application directly from Apple to the client. However, to allow the two scripts to operate better together, a forked version of installinstallmacos.py is used (see grahampugh/macadmin-scripts).

It is alternatively possible to use the softwareupdate --fetch-full-installer command that is built in to macOS since 10.15, though the default method is to date more reliable and more flexible.

The script has many options to suit a large variety of workflows, management tools and user experiences. Originally designed to work with Macs that are enrolled into Jamf Pro, it now has additional options for use with other management systems or no management systems at all.

Please refer to the Wiki for detailed documentation