MacOS – “fatal: Not a valid object name develop” error when running brew upgrade/cleanup

Install iTerm.app You can set up a profile that you can set the start up program do be /bin/bash

Or create a new admin user and use that to restore or reinstall files. I think you might be able to use dscl from that user to change the original users' shell

you can brew unlink and brew link for each app.

if its painful for you, you can back up from your timemachine "after boot".

if you import data from your timemachine at starting your machine, brew broken.

but after you start up your machine at once, you will success!