I can't change my mac's keyboard batteries?
I have a 28" iMac but with the keyboard without lightning charging, it is run by batteries. It stopped working obviously as the batteries were out of charge so i went to remove the batteries using a coin but it is completely stuck. I've used a number of items but its properly stuck and their's no way for me to change the batteries and replace my batteries. What can I do because I paid over 1700 for the mac and the keyboard is unusable and it's so frustrating. Please help.
iMac, OS X El Capitan (10.11.4)