Here is how to reconnect keyboard #A1314
Hi!
After struggling and following useless steps, I finally figured out how to reconnect my good and old pal Apple Keyboard A1314 (that compact model powered by removable batteries).
STEP 1
Check if your batteries are properly charged. This is quite obvious but essential.
STEP 2
Open System Preferences > Bluetooth. Keep an eye on the subtab Nearby Devices
STEP 3
Press and HOLD the keyboard's power button. IMPORTANT: don't let it go, even when the green light appears. Continue pressing the ON/OFF button during the process.
STEP 4
It will show up shortly in your Bluetooth preferences. DON’T LET IT GO. While still holding the power button pressed, click PAIR.
STEP 5
With the blessed button pressed, type the six-digit numbers on the keyboard, hit enter, and finally, you are free to go.
In short, the trick is to keep ON/OFF pressed until you type the numbers and hit enter to re-pair the keyboard.
Hope this helps you. The steps helped me through this annoying process many times and worked like a charm in different OS versions, including Sequoia 15.1.
-Cheers.
MacBook Pro 15″, macOS 15.1