Rosemary Brown describes a problem noted by a few other MacFixIt readers, where a UPS (uninterruptable power supply) seems to "hog" the chain, and produce strange problems for the keyboard and mouse. ...

I upgraded from a wired Corsair mouse to a wireless Corsair mouse. I have a Mac Studio with limited USB ports. I have - an expensive - Plugable Thunderbolt dock/hub. I put the USB receiver on the hub, ...

Just because you can plug a device into a USB hub doesn't necessarily mean you should.