Yes, they work on both. The Mac version doesn't come with the USB receiver though, so it might be an issue on a Windows rig if your Bluetooth isn't up to scratch. Of course, you can buy the USB receiver separately if needed. I have the Mac version, even though I don't own a Mac, because I already have some of the receivers and I like the colour scheme better than the PC models. Plus it was cheaper. It's a good deal, but I paid less for mine on Amazon Warehouse UK.
Yeah I use them for both :D
Can these only be used on Macs? I have both Windows and Mac and wondering if I could alternate between the two.