CableCreation USB-C to Dual HDMI 4K, CableCreation Type C to 2 HDMI Ports Adapter, Thunderbolt 3 Compatible, Male to Female, for MacBook Pro/MacBook/iMac 2017/Chromebook Pixel/Yoga 920/XPS 13/Surface Book 2, Black

This adapter is built with the solution of [DisplayPort Alternate Mode] USB-C to HDMI adapter is compatible with the following device: *Macbook Air 2018 *iMac 2017 / iMac Pro 2017 *MacBook Pro 2017 & 2016 *MacBook 2016 & 2015 *New Chromebook Pixel *XPS 15 & 13 & 12 *Spectre x360 13 & 15 inch *Asus Zen AIO All in One PC *Surface Book 2 If your device is not in the list, please don’t hesitate to contact us. Important Notes: 1.Before purchase,please make sure your PC support “DisplayPort Alternate Mode”.2.️For MacOS system,it will NOT Support Extend Mode, two HDMI monitors will show the same image. As the third picture shows.️If you want to use extend mode on MacOS system, you can use Win10 system or you can consider product ASIN B07799WBKW (CD0502)& ASIN B019Q652AG (CD0101). Please be informed that CD0502 is ONLY compatible with Thunderbolt 3 laptop, it is also NOT compatible with MacBook12’’ due to this laptop is USB-C Gen 1 NOT Thunderbolt. 3. In order to enjoy the 4K high resolution, please make sure to use HDMI 2.0 cable. 4.Supports resolution up to 4k@30Hz,but we recommend you to make sure your monitor/tv could supply corresponding output. 5. If the resolution of your laptop is higher than the external monitor. For windows: Windows Menu--> Setting--> Display--> Advanced Display Settings, set your laptop's resolution same as or lower the resolution of external monitor. For MacOS: Left-upper Apple icon-->System Preferences-->Displays-->Mirror displays. Then your HDMI monitor would mirror your Mac. However here you have two choices. One is "Optimize For" your built-in Retina Display, the other is "Optimize For" your HDMI monitor. You can choose which one you like. 6.For Windows system laptop, if the external monitor could not work, please update the BIOS and graphic card driver from laptop official website.