I have bought recently Apple Magic Keyboard, and it was fine untill this morning when it stopped working. Actually the letter keys are not working and other keys are working just fine. I have tried unpaire it and repaire it but to no avail. Also with or without the USB to Lighting cable connected to Mac Mini late 2012 with OS X 10.11.6 on it. In the bluetooth menu i can see that Keyboard is connected. Also Enter key is not working. I am sorry for eventually posting this wrong, i am new here and i cannot work without the keyboard. Need help. Thank you in advanced.