Wipe Command - Big Sur - 6 Digit worked, but wouldn't re-install

[zophar]

I Tried to wipe a Big Sur machine, expecting it to re-install the OS and connect to MDM.

The 6 digits worked. it rebooted to the no entry sign. An internet recovery didn't work (both with newest release keypress and default release - it was orignally a Sierra machine).

In the end the only option was a USB bootable Big Sur re-build. It did rejoin the MDM correctly though.

Anyone else seen this - is this how it's supposed to function? Seems odd.

[Cayde-6]

@zophar That is expected behaviour, the wipe command only wipes the hard drive it doesn't initiate an internet recovery nor does the mac automatically.

[jbisgett · Accepted solution]

I use this script https://github.com/kc9wwh/macOSUpgrade to initiate a reinstall of the OS when needed. I can either initiate it remotely or through Self-Service on a machine. You need to download the macOS BigSur installer and make it available as another policy, which is called by this script. I use https://github.com/scriptingosx/fetch-installer-pkg to download the latest BigSur install.pkg, which can then be uploaded to Jamf Admin.

This process is especially helpful with headless servers running BigSur, with the automatic progress through setup screens checked in the prestage.

[zophar]

Fantastic, thank you jbisgett!