Q: Does MacBook Pro require to be plugged in to use HDMI connected monitor
I have a MacBook Pro and use a 27 in monitor connected to the HDMI. All is well unless I unplug the charging. Even with 100% battery if I unplug the power and run on battery the HDMI doesn't drive the monitor. I am pretty sure I had used the monitor on battery power before the upgrade to Yosemite. MacBook is just a few months old.
MacBook Pro (Retina, 15-inch, Mid 2014), iOS 8.3
Posted on Jun 17, 2015 10:01 AM
Community Specialists
Hello stanbenavides,
Thanks for replying with some additional detail.
Yes, you're right. To use your MacBook Pro in closed clamshell mode with an external monitor, it must be connected to power.
For more information, see How to use your Mac notebook computer in closed-clamshell (display closed) mode with an external display.
Apologies for any confusion caused.
Best Regards,
Jeremy
Posted on Jun 20, 2015 12:49 PM