Q: MacBook not recognizing HDMI cable disconnecting

Specs:

MacBook Pro Retina Display 2015
Processor: 2.5GHz
16GB RAM
Graphics: AMD Radeon R9 370X
OS: El Capitan 10.11.2

The Macbook does not recognize when I've disconnected a TV connected via HDMI. This causes problems when displaying applications on the TV because they are not visible on the monitor after disconnecting until reconnecting, dragging the windows over to my monitor, and disconnecting again.

The Macbook thinks it's still connected, but it's not:

MacBook Pro (Retina, 15-inch, Mid 2015), OS X El Capitan (10.11.2)

Posted on Jan 12, 2016 9:27 PM

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Q: MacBook not recognizing HDMI cable disconnecting

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by Allen A,

Allen A Jan 14, 2016 7:42 AM in response to coopere905
Community Specialists

Jan 14, 2016 7:42 AM in response to coopere905

Howdy coopere905,

If your MacBook Pro is failing to recognize that a display or display cable has been disconnected it can help to reset the Mac's SMC and NVRAM, as detailed in the articles linked below.
Resetting the System Management Controller (SMC) on your Mac
https://support.apple.com/en-us/HT201295
How to Reset NVRAM on your Mac
https://support.apple.com/en-us/HT204063

All my best.
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by Allen A,

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