I was once working on an app for a Clover point of sale system. On the side there is a USB-C port. I plugged my new-ish MacBook Pro into it thinking I would be

I was once working on an app for a Clover point of sale system. On the side there is a USB-C port. I plugged my new-ish MacBook Pro into it thinking I would be able to debug, but instead my mac instantly went black. I unplugged it, and eventually it rebooted, but the USB ports on that side never worked again. Turns out that port is intended for connecting a receipt printer, and clearly not in any way a standard USB-C. There is actually a micro usb port elsewhere on the device that can be used for debugging. Lesson learned the hard way.