Is it possible to sign in Message app from terminal ? When I search for it, I only see on how to send imessage from terminal. Thus, how can I do that ?
Messages supports AppleScript. You can view the Messages's AppleScript dictionary using the AppleScript Editor:
Applications > Utilities > AppleScript Editor.app
The AppleScript command
log in suggests you can sign in programmatically:
log in v : Log in to the specified service, or all services if none is specified. If the account password is not in the keychain the user will be prompted to enter one.
An example AppleScript to log in would be:
tell application "Messages" -- Log into every session log in end tell
You can then use the osascript command line tool to issue AppleScript commands via the Terminal:
osascript command to log in would be:
osascript -e 'tell application "Messages" to log in'