Recently I paired it with an Android phone. When I tried to unpair it from the phone, and repair it with my MacBook Pro, nothing worked. I tried holding down the button, pressing the button and different key combinations, etc. Most of the time the MacBook couldn't even find it, and if it did, the pairing would fail.
Then I tried to repair it to my Android phone, that didn't work either. I tried pairing it to another Android phone. Nothing. I changed the batteries for new ones (twice). Most of the time the green light would come on for about two seconds, and then turn off. This was all very aggravating, since pairing is the must fundamental thing that the keyboard needs to do. It is unusuable if you can't get it to pair.
Finally I found a good idea online. I am documenting it here so that if I ever have this problem again, I will remember the steps that I had to take to repair. I have tried this with both the Android phone, and the MacBook Pro, and it seemed to work with both.
- Turn on Bluetooth (if it isn't already turned on).
- Begin scanning for devices.
- In Mac OSX, click on the little Bluetooth icon at the top of the screen. Click "Setup Bluetooth Device...".