Review on 🖥️ StarTech.com 4 Port DisplayPort KVM Switch w/ Audio - USB - Keyboard, Video, Mouse, Computer Switch Box for 2560x1600 DP Monitor (SV431DPUA) - Black by Bobby Posner

Unfortunately there are quite a few DisplayPort KVM options these days and this one works but has one very annoying downside: no display emulation. Other KVMs, such as Some devices, such as IOGear's DVI options, support display emulation, which makes the computer think the monitor is still there when you switch ports on the KVM. Without display emulation, your computer will behave as if the monitor is off every time you switch to another computer. It's not the end of the world, but it causes a few problems: 1) you can't quickly switch between computers because it takes 5-10 seconds (or more) for the computer to re-detect the monitor and redraw the desktop, and 2 ) sometimes the computer does not properly recognize a reconnected monitor and appears in a strange state (unrecognized or non-ideal resolution). Overall, KVM is decent but not perfect. (Also, port 1 stopped working with my macbook, but port 4 works, so it didn't break the deal.)