The USB-C Digital AV Multiport Adapter connects the following devices to a display that uses an HDMI cable:
This adapter also connects your Mac or iPad Pro to USB-A devices, and it includes a USB-C port for charging your Mac notebook or iPad Pro. All three ports can be used simultaneously.
Video
HDMI
Use the HDMI port of this adapter with a display, TV, or projector that connects using an HDMI cable. It's HDCP compliant and supports the specifications below, depending on the model of the adapter.
The model number is printed on the retail box and the side of the adapter, near the ports.
Model A2119 is the newest model of this adapter. It supports HDMI 2.0 at these resolutions and refresh rates when used with macOS Mojave 10.14.6 or later or iOS 12.4 or later. It also supports HDR video in HDR10 and Dolby Vision formats when connected to a compatible playback device and display, TV, or projector.
- Up to 1080p at 60Hz
- 3840 x 2160 at 30Hz
- 3840 x 2160 at 60Hz with these devices:
- 15-inch MacBook Pro introduced in 2017 or later
- Retina iMac introduced in 2017 or later
- iMac Pro
- iPad Pro
Model A1621 supports HDMI 1.4b at these resolutions and refresh rates when used with macOS Sierra 10.12 or later or iOS 12 or later:
- Up to 1080p at 60Hz
- 3840 x 2160 at 30Hz
After connecting your display, TV, or projector, video from your Mac or iPad Pro should appear within 10 seconds.
Data transfer and charging other devices
USB-A 
Use the USB-A port of this adapter with flash drives, cameras, and other devices that connect to USB-A for data transfer or charging. It supports USB 3 data-transfer speeds up to 5Gbps.
For example, you can connect the Apple Lightning to USB Cable to this port to sync and charge your iPhone, iPad, or iPod with your Mac.
Charging your Mac or iPad Pro
USB-C
Use the USB-C port of this adapter for charging your Mac notebook or iPad Pro, not for data transfer or video. For example, you can connect one end of the Apple Thunderbolt 3 (USB-C) Cable or Apple USB-C Charge Cable to the USB-C port of this adapter, and connect the other end to an Apple USB-C Power Adapter.
Because this adapter draws power from your Mac or iPad Pro even when your Mac or iPad Pro is asleep, you might want to unplug it when it's not also connected to power for charging.
Learn more
If you have issues with the adapter, unplug it, then make sure that you've plugged all cables into the adapter before plugging the adapter into your Mac or iPad Pro.
Learn about using 4K displays, 5K displays, and Ultra HD TVs with your Mac.
These devices aren't compatible with this adapter:
- G-Technology G-DRIVE mobile USB 3.0 Hard Drive (Apple part number HF4F2VC/A)
- Apple USB SuperDrive model manufactured before Fall 2010