So I have this situation where my Macbook doesn't respond to any of my clicks with the built in trackpad. I do a hard reset, and it's still not working.. Then I realised, something was pressing down on my Magic Trackpad, which was on the other side of the room. This has happened before and it drives me mad. When multiple pointing devices are being used, it is not possible to hold down the button on one and click with another. This works any way round - built in trackpad stops Magic Trackpad from clicking, USB mouse stops both from clicking, etc. I should clarify that it is still possible to move the cursor, and do touch gestures, including the ones that involve clicking. It is just not possible to click two pointing devices at the same time. I think this is an unbelievably stupid design flaw. It made me think my computer had crashed. If I worked at Apple I'd kick some ass over this. But I don't, so instead I'd like to know: is there any way to fix this on my own computer?