The new usb-c digital av multiport adapter adds support for hdmi 2.0, an upgrade from the original model’s hdmi 1.4b. this means you can now drive 4k 3840 x 2160 video at 60hz from the following macs and ipads:
15-inch macbook pro introduced in 2017 or later
retina imac introduced in 2017 or later
imac pro
ipad pro
to take advantage of that 60hz 4k video your mac must be running macos mojave 10.14.6 or later, while the ipad pro must be running ios 12.4 or later. the previous version fo the dongle only supported 4k at 30hz and 1080p at 60hz.
other improvements with the new usb-c digital av multiport adapter include support for hdr video in hdr10, as well as dolby vision – so long as you’re outputting to a compatible playback device and display, tv, or projector. the functionality of the usb-c port and usb-a port remains the same on the new version.