
Power output: Thunderbolt docks can charge your computer, too, so you don’t have to worry about plugging in a second cable.(Apple’s late-2020, M1-based MacBooks support only one external display, even if you’re using a dock.) We set each monitor to its maximum resolution and verified that both were performing at the proper refresh rate. Using an array of DisplayPort cables, HDMI cables, and USB-C adapters, depending on each dock’s port selection, we connected our 16-inch MacBook Pro and a pair of 4K monitors to each dock.


USB-A, USB-C, Thunderbolt 3 or 4: The “standard” USB-A port is still the most common input for peripherals-including external drives, wired keyboards, and more-and most Thunderbolt docks have several of them.
