Does not support MST on Mac OS This KOZYC USB-C adapter features 2x HDMI port, 1x USB 3.0 port, and 1x100W PD charging port, Note: Android system only supports AAA mode(mirror mode); macOS supports AAA, and ABB mode (does not support MST ABC mode); Windows OS supports AAA, ABB, ABA, and ABC mode. 4k Resolution This USB C to HDMI Adapter resolution is up to 4K@30Hz. With backward compatible with 60Hz for resolutions of 2K/1080P. Please note: If you want to get a 4k resolution, please make sure your device supports 4k and uses a HDMI cable 2.0 or better Plug and Play No external power supply is required for this USB C to HDMI Adapter, just plug and play, and no need for any driver. Note: NOT for all USB-C port laptops, Make sure your laptop or PC supports Thunderbolt 3 or displayport output mode DP ALT mode Broad Compatibility This USB C HDMI Adapter is compatible with Linux, Windows, Mac OS, & Android systems, with compatible Thunderbolt 3 and DP 1.4 alt mode. Support: MacBook/ MacBook Pro, Dell XPS, LG, HP, Samsung Galaxy, etc.