Downgrade composer from 2.x to 1.x via brew
Dec 2, 2020
You just upgraded your brew packages and composer updated itself to version 2.x but you still need version 1.x? This is how you can downgrade (& upgrade again):
Show available versions of composer:
brew log composer
For me the latest 1.x version to date is: composer 1.10.15
Let’s downgrade
composer self-update 1.10.15
To switch back to the 2.x version use
composer self-update --rollback