So the IR receiver on my iMac isn't working. I've got a handful of Apple remotes, and none of them seem to work with my iMac. It's worked in the past, but come to think of it, I haven't used a remote since my iMac's Hard Drive was replaced under the recent Seagate recall. Is it possible that Apple disconnected the IR receiver or otherwise damaged it during that repair? Alternatively, it could just be something on the OS side of things. How can I check if it's working?