I just bought my first 2.4 GHz mBot and got everything to work (including line following), except for the IR remote. I tried uploading firmware and the resetting default program, which I managed to do succesfully, but turned out not to be a solution. I used new batteries in the remote, exchanged them for others, tested with a camera phone and could see the IR light… but still no luck. I am on Mac OS High Sierra.
My only guess left is that I was unlucky to get a faulty mBot. Any other ideas? And what should I do if it is indeed faulty?