2009 wireless keyboard giving serious lag on macbook pro I've got a 2009 wireless keyboard connecting to a 2012 Macbook Pro running El Capitan, and it's giving me serious lags; occasionally sticking; sometimes just disconnecting. 

Things I've tried thus far include


resetting PRAM
resetting the bluetooth keyboard
running it in safe mode


and nothing seems to solve the problem. Any thoughts on this? Am I doomed? What's the next troubleshooting step?

Thanks!
Without being cheeky, it could just be a sign of age. The keyboard itself is 9 years old and the MBP is 6 years old.

You did well to get so long out of the keyboard, but I wouldn't be too sure what specifically could be wrong with it or if it would be worth fixing.

I wouldn't rule out a hardware problem caused by 9 years of usage.