Why can't my system see my battery and how do I fix it?
I'm new in all this Mac stuff, I just got an old 2012 it works fine when I got it, but now it only works with the power cable.
I have tried to reinstall the system software and I've tried another battery and a SMC reset but none of that works.
Is this a logic board that the problem and what will it cost?
What can i do?