Hi,

I have two Mac mini and two monitors, 1x Dell U4021QW and 1x Asus Pro Art 27".

Mac mini 1 
Dell U4021QW 40" on Thunderbolt
ASUS 27" on HDMI 1 

Mac mini 2 
Dell U4021QW 40" on DisplayPort
ASUS 27" on HDMI 2

How do I get the DDM to switch both monitors at once? It is setup to do the Dell U4021QW which is does just fine, but I cannot get the ASUS monitor to auto switch inputs?

Any help really appreciated.