Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Couldn't use with iMac sleep mode

No matter the adjustments I made, it would turn on and off over and over when iMac went to 'sleep'. I gave it two weeks and constant fiddling, but I have given up. Two stars for layout and the unit has a good heft to it. Unit feels substantial and has a nice long cord with a flat to the wall plug. It just wouldn't work with my already power-conscientious iMac.