macOS Sierra with three external displays on a MBPr

In the last three versions of Mac OS x, I was able to connect two monitors to separate ports thunderbolt and a third monitor to the HDMI (last MBPr) port using all four screens (the retina display is the 4th).  After the installation of Sierra this hardware configuration blocks the computer (complete gel to the top, have the power with the power button on the keyboard).

Any thoughts on how to fix cela or seems to be just a bug in the first version of Mac OS?

Hey there BeeeLock,

I understand that your configuration of your external monitors may cause a few problems after your update for Sierra. To reset your NVRAM memory, that can help you resolve this problem, follow these steps:

How to reset the NVRAM on your Mac - Apple Support

Thank you for coming to Apple Support communities!

Kind regards.

Tags: Notebooks

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    Click the [Support] links to help with non-Apple products.

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