About the Apple USB-C to USB Adaptor
Connect a Mac that has a Thunderbolt 3 (USB-C) or USB-C port to a USB-A device.
The USB-C to USB Adapter connects a Mac that has a Thunderbolt 3 (USB-C) or USB-C port to a device that uses a USB-A cable.
To connect an iPhone or iPad with USB-C connector to the USB-A port on a Mac, use a third-party cable, such as the Belkin BOOST↑Charge Pro Flex USB-A to USB-C Cable.
Data transfer and charging other devices
USB-A
Use the USB-A port of this adaptor with flash drives, cameras, USB hubs and other devices that connect to USB-A for data transfer or charging. It supports data-transfer speeds of up to 5 Gbps (USB 3.1 Gen 1).
For example, you can connect the Apple Lightning to USB Cable Or use the Apple USB-C to Lightning cable to connect your iOS device without an adapter.
This adaptor requires no power to operate, but devices that you plug into it might draw power from your Mac. To connect to USB-A devices and charge your MacBook at the same time, you can use the Apple USB-C Digital AV Multiport Adapter or Apple USB-C VGA Multiport Adapter, which also provides a USB-C port for charging.
Learn more
Information about products not manufactured by Apple, or independent websites not controlled or tested by Apple, is provided without recommendation or endorsement. Apple assumes no responsibility with regard to the selection, performance or use of third-party websites or products. Apple makes no representations regarding third-party website accuracy or reliability. Contact the vendor for additional information.