I tested the only 4K UHD adapter that appears to be in stock anywhere right now: the StarTech.com USB 3.0 to HDMI Adapter, which is DisplayLink certified.

The QGeeM USB-C to HDMI Adapter is a good choice if you need something inexpensive and quickly. It won't push full 60Hz at 4K, but it'll work at 1080p with no problem.

Plugable’s new USB-C or USB 3.0 Quad HDMI Adapter (USBC-768H4) can handle four extended HDMI screens through a single USB-C or USB 3.0 port and provides support for resolutions up to 1,920 x ...

The Moshi USB-C to HDMI adapter is a simple device with a twist — the ability to charge any iPad Pro or USB-C portable Mac. Your tiny new AV friend This small, aluminum box is as simple as it ...

The HDMI port now supports HDMI 2.0, which means when it's used with a device running macOS Mojave 10.14.6 or later, or iOS 12.4 or later, it can output up to a resolution of 3840-by-2160 at 60Hz ...

One of Thunderbolt's strongest competitors is the faster new USB 3.0, which isn't on this 2011 MacBook Air but which now is standard on new 2012 Macs. USB 3.0 can't match Thunderbolt for speed ...

More recently, HDMI 2.0 became the only remaining video connector that’s not USB-C. Apple built HDMI into many Intel models as well as on the M1 Mac mini, the 14-inch and 16-inch M1 Pro/Max ...