Met this issue on my 2015 MacBook Pro, tried to connect a 4k display with HDMI only to find out that it can only display 4k at 30hz. I thought it was only a con

Met this issue on my 2015 MacBook Pro, tried to connect a 4k display with HDMI only to find out that it can only display 4k at 30hz. I thought it was only a configuration issue, but seems like MBP can only do 4k@30hz when connecting with HDMI (it uses HDMI 1.2 IIRC). Works properly with a DisplayPort cable though.