HT205858: About the USB-C Multiport Adapter Update 1.0
Learn about About the USB-C Multiport Adapter Update 1.0
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Q: MacBook & USB-C Multiport Adapter not detecting displays...?
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Sep 16, 2016 5:00 AMby mario49,Greetings anniebecca,
Thank you for using Apple Support Communities. It seems like you want to use an external display with your MacBook. I would recommend you read these articles, they may be able to help troubleshoot and isolate the issue.Get help with video issues on external displays connected to your Mac - Apple Support
Another thing you can do is to reset the NVRAM since this is with a second display.
How to Reset NVRAM on your Mac - Apple Support
Take care.
