This display port adapter was exactly what I needed when I upgraded to a 4k TV. The TV no longer takes a 30 seconds to receive a signal from my computer. I can now finally see the bios boot menu when turning on the computer.
Monoprice is a great site to source all your A/V and data equipment needs!
The adapter generally works, but was not able to deliver 4K60Hz from a 2017 MacBook Air to a 4k LG monitor. All it could delivery was 4K30Hz. I tested my HDMI cables and monitor with another computer and they worked fine at 4K60.