hi, I have a MacBook Pro retina 13" (mid 2014). I have a strange situation. It will only stay on with a hdmi cable in. If you unplug the cable it will shut down within minutes. It works fine in safe boot mode. I have tried resetting everything and reinstalling the OS. have had a two hour phone call to apple to no avail. Really don't want to have to take it in- so I was wondering if anyone had any ideas!