I recently bought a thunderbolt-ethernet cable because my university only provides internet access via ethernet, and I have a MacBook Air. The cable works pretty well, except that it really heats up my laptop (particularly the region around the top of the keyboard). Any idea how I can avoid this, if at all? Also, does a USB-ethernet cable also do this?
The USB-C gigabit adapters and thunderbolt adapters do run hot. I haven’t found any that do not. Older USB A ones run slower and cooler. Best is to use WiFi as that is the most power efficient adapter for the Air and MacBook line.