If you want a different terminal application to be used when using the Multipass system menu icon, you need to tell macOS to use it for the
.command file type. Here’s two ways on how to achieve that:
$ mdls /Applications/iTerm.app/ | grep BundleIdentifier kMDItemCFBundleIdentifier = "com.googlecode.iterm2"
And make it the default for script files using
duti -s com.googlecode.iTerm2 com.apple.terminal.shell-script shell
Create an empty file with a
.command extension and find it in Finder. Select the file and press
⌘I. You should be presented with an information pane like this:
Expand the “Open with:” section, select your preferred terminal application and click on “Change All…”.