I am only writing this from my own experience, it did not work with my iMac. I even contacted the manufacturer and they weren't sure what the problem was. I didn't test it with other Pcs, but iMacs are pretty low powered. It would work with my video switcher, i.e. ATEM Mini, but not my iMac. So it defeated the purpose of buying this particular UPS. I recommend not to buy this if you're going to connect an iMac to it, buy the ones that are recommended in Apple community forum.