Mail is locked up. How do I force a shut down or reboot. Mail is interrupting all action.
I'm using a MacBook Pro. Yosemite OS. Latest version. I am trying to print an email. I can't get Print or Cancel to respond. I can't go back to Mail. I can't shut down because Mail interrupts shut down or restart. I've can't think of anything else to try.
Mac Pro, iOS 9.1
