Auto Run HomeKit Automation when waking from sleep OSX

My query was not so much to do with the Mac itself, but how to automatically power down all the peripheral equipment when the Mac mini isn’t being used. Some of it is computer equipment, but most of the power is consumed by A/V equipment which I use with the computer.

The Mac and the monitor pretty well look after themselves in that respect, going dormant when not in use for a while. The problem I’m trying to solve is how to automatically power down all the peripherals and fire them up again. The Mac is generally used quite intensively when it’s being used, but is often left unused for several days at a time.

My previous solution was a USB controlled switch. My old iMac was switched on and off as required and everything else followed suit. It worked brilliantly for many years. Sometimes I left the iMac on overnight for housekeeping tasks, but manually disabled the peripherals.

The power switch on my Mac mini is pretty well inaccessible because the Mac mini lives on a shelf with other stuff above it. Even when put on a desk, it’s awkward to use that switch. It was clearly intended not to be operated under normal circumstances.

I bought a slave socket, but it proved to be unreliable, triggering at odd times, presumably when the Mac was housekeeping. I also tried using the slave socket triggered by the monitor instead, but the standby current seems to be above the threshold to trigger the slave sockets. A HomeKit smart switch could be a possible solution, but only if I can make it trigger according to the operational state of the Mac mini. It would also allow me to automate other aspects of my office, such as smart task lights coming on if the Mac is being used after dark, or disabling the sound of my doorbell and flashing lights instead if I’m working on an audio project.

I’ve got HomeKit automating quite a lot of stuff, but I haven’t found a way for HomeKit or Shortcuts to react according to whether my Mac mini is being used or not.