It enables effortless control over two 4K-enabled computers with DisplayPort video connections using a single USB keyboard, USB mouse and DisplayPort video console. Perhaps there are some command-line tools that could debug the scenario.IOGEAR's 2-Port DisplayPort KVM switch with audio and DisplayPort 1.2 connections break revolutionary new ground in KVM functionality by combining advanced Cinema 4K Video and USB 2.0 technology. That did not make any difference.Īlso to eliminate any possible problems, I reset the SMC per. To simplify, I have turned off Keyboard Emulation on the Mac's kvm port per the kvm switch manual (hsm mode, then press the F10 key). Regular usb keyboards such as the Logitech MK200 Media work just fine through the kvm switch.

Oddly, when the keyboard is connected through the mouse port on the kvm switch, it works fine on the Mac (but then of course, some mice do not work, such as the ergoomic Evoluent C that I use a standard Mac mouse does work that way). But the Matias keyboard is shown, when under the kvm switch, in the dropdown menu on one of the dialogs on the System Preferences keyboard panel. The external usb keyboard, when running under the kvm switch, works on the macOS login screen (meaning for example, I can type my password) but not after the user is logged in (keys can be pressed but no letters show up, for example). The problem occurs on a 2013 Macbook Pro, running Mojave, all up-to-date. This keyboard works fine when directly connected to the Mac, but not on the Mac through the kvm switch. Also importantly, this keyboard works fine through the kvm switch to an 2016-era PC laptop running Ubuntu.

Importantly, this is under the Iogear GCS1204G kvm switch (product manual : ). The keyboard in question is a Matias tenkeyless backlit usb keyboard ( ).

Logitech mouse mac iogear kvm