About USB-C on Mac
USB-C is a USB standard that supports power, data transfer and video output simultaneously.
If your portable Mac has one or more USB-C ports, you can connect it to a USB-C power adapter to charge your Mac. If you have an iMac or portable Mac with USB-C ports, you can use a USB-C to Lightning cable and USB-C adapter cables to connect your Mac to other devices and displays.
Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter, to connect certain newer MacBook and iMac models to Thunderbolt 2 devices or to a Thunderbolt display. See the Apple Support article About the Apple Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter.
USB-C Digital AV Multiport Adapter, to connect to an HDMI display, a standard USB device and a USB-C power adapter. See the Apple Support article About the Apple USB-C Digital AV Multiport Adapter.
USB-C VGA Multiport Adapter, to connect to a VGA display, a standard USB device and a USB-C power adapter. See the Apple Support article About the Apple USB-C VGA Multiport Adapter.
USB-C to USB Adapter, to connect to standard USB devices, including cameras, printers and thumb drives. This adapter cable doesn’t connect to a power adapter. See the Apple Support article About the Apple USB-C to USB Adapter.
USB-C to Lightning Cable, to connect iPhone, iPad, iPod touch or iPod nano to your computer’s USB-C port for syncing and charging. See the Apple Support article About the Apple USB-C to Lightning Cable.
Important: To prevent possible data loss or corruption, avoid disconnecting the USB-C Digital AV Multiport Adapter or the USB-C VGA Multiport Adapter from AC power while transferring data.