Had an issue requiring a hard restart with my MacBook this morning. I came home and "woke up" my MacBook and had the regular log in screen come up (I have it set to require logging in when the screen saver comes on after sitting idle). I closed the MacBook to take it out to my shop. Plugged in the ac and opened the MacBook, but had the screen black. I tapped the space bar several times which always brings up the display and required log in. Not this time. I heard the fans going a bit. I ended up holding down the power button for shut down. Restarted and is now fine. Not sure what to make of it. Is this unusual behavior? I did have a bluetooth mouse connected when closing the Book. I brought the mouse with me to the shop. I never did shut the mouse off, but that shouldn't be a problem.