These days all the major manufacturers for these types of accessories have perfected their design and implementation, so you really can’t go wrong with any option. There isn’t a huge difference in USB-C adapters so any one you get will help out your best Mac. $11 at Amazon Most adapters offer similar preformance With a USB 3.1 port, the AmazonBasics USB-C to USB-A adapter can give you the fastest data transfer speeds you can get, all while having a power output of 3A, making charging your device through your MacBook a breeze. $10 at Best Buy 3A power output AmazonBasics USB-C to USB-A Adapter Its short but flexible cable helps make connections easier in close quarters. The Insignia USB-C to USB-A adapter offers you a USB 3.0 connection and data transfer speeds of up to 5 GBs per second. $15 at Amazon Short flexible cable Insignia USB-C to USB-A adapter

This small cable has a female USB-A end attached to a male USB-C end and can be used to charge devices as well as transfer data. If you want the speed of USB-A 3.1, the Anker USB-C to USB-A adapter is the option for you. $17 at Amazon 3.1 speeds and data transfer Anker USB-C to USB 3.1 Adapter It uses USB OTG, and the USB-A end is 3.0, so not only will your iPhone or iPad connect but can also connect your hard drives, printers, and other devices. The small dongle will fit on the end of any USB cord and conveniently convert it to a USB-C connection. If you don’t like the idea of carrying around a dongle that has an extra cord, this Anker USB-C to USB-A adapter is a tiny solution. 2-pack value Anker USB C to USB Adapter High-Speed Data Transfer (2 pack)

Macbook usb c port