Important
There does not appear to be an official build of 1.15.0 available for Apple silicon.
This is a community plugin and is thus not built-in to proto. In order to use it, first either add it to your global or project-based .prototools
by running:
proto plugin add mage "source:https://raw.githubusercontent.com/Phault/proto-toml-plugins/main/mage/plugin.toml" --global
proto install mage
proto plugin add mage "source:https://raw.githubusercontent.com/Phault/proto-toml-plugins/main/mage/plugin.toml"
proto pin mage latest --resolve