

If the video on your HDTV or display extends beyond the borders of the screen, open Displays preferences and adjust the Underscan slider for a better fit. Unplug the HDMI cable from your Mac, then plug it in again.Turn off the HDMI device while your Mac is turned on.If your Mac doesn't recognize your HDTV, display, or other HDMI device after making the connection:

If using an adapter, check the specifications of the adapter to learn about supported resolutions and other details. Safari in macOS Sierra or later also supports HDCP-encrypted playback, if the web page is HTML5-enabled and the content is FairPlay Streaming-enabled and delivered using Media Source Extensions or HTTP Live Streaming.

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Learn how to identify the ports on your Mac. Mac computers that have any of the following ports can connect to HDMI devices. LIONWEI Adapters for MacBook Pro 2020/2019/2018/2017/2016 Dongle,6 in 1 Multiport USB C Hub HDMI Adapter for MacBook Pro/Air Adapter with HDMI, USB 3.0, PD Charging, SD/TF Card Readers 4.5 out of 5 stars 327. USB C Hub HDMI Adapter for MacBook Pro, Multi-Ports Mac Dongle with 4K USB C to HDMI, 7 in 1 USB C Hub, USB C to HDMI SD TF Card Reader 3 USB 3.0 and USB C Power Pass-Through Port Adapters.
