MacQ

Switch input, set brightness and volume on your BenQ monitor, right from the macOS menu bar.

MacQ is a menu-bar app for driving a BenQ monitor from macOS. Switch the input between USB-C, HDMI 1 and HDMI 2, and pull brightness and volume with live sliders, without reaching for the buttons under the panel.

It talks to the display over DDC/CI, the control channel already carried on the video cable, so there is nothing to install on the monitor side. Native Swift, around 4 MB, no bundled browser. Give the inputs your own names, launch it at login, and forget it is there.