Connect multiple displays to your Mac mini (2018)
With four Thunderbolt 3 ports built in, Mac mini (2018) supports an HDMI display along with two 4K displays or one 5K display.
Mac mini (2018) supports one HDMI display with a resolution of 4096 x 2160 at 60Hz, plus one of the following configurations:
- One 5K display with a resolution of 5120 x 2880 at 60Hz
- Two single-stream transport (SST) 4K displays with resolutions of 4096 x 2304 at 60Hz
- One multi-stream transport (MST) 4K display with a maximum resolution of 4096 x 2304 at 60Hz