Unable to control 30" Apple Cinema Display about ddcctl HOT 2 CLOSED

I believe these Apple monitors present a USB HID device over their internal hub for the OS to control them using the native control panel. Its not DDC at all, which is what ddcctl is about.

https://www.usb.org/document-library/monitor-control-class-10

There are also linux-oriented utilities for controlling them but I have no idea if they can run on OS X

https://github.com/ondrej-zary/usbmonctl
https://github.com/warvariuc/acdcontrol
https://www.ddcutil.com/usb/

I have no intent of adding support for this myself, open to it if a patch seems reasonable and if there's no other working option on OS X for command line control.

from ddcctl.

The two first seem to need things like hiddev_report_info and HIDIOCGUSAGE from Linux-specific(?) includes:

#include <linux/types.h>
#include <asm/types.h>

The last one requires libudev which also seems Linux-specific.

If anyone has a workaround or other tools that accomplish the task, post them here.

from ddcctl.