External Display not working

I have a 2012 MacBook Pro 13" and was attempting to connect my HDMI display and was unable to get the computer to display or even detect the monitor. I know the adapter was not the problem as I was able to get a 2010 Mac Mini to display output using the hdmi adapter with its MiniDP port. At the same time the MacBook Pro does display output on a LED Cinema Display. The Mac Mini is running Sierra 10.12 natively so I believe it's OCLP that is causing the problem.

submitted by /u/Robloxian_pro2012
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