My and mouse are not working with my mac. How do I get them to communicate with each other again?

The following will require any USB keyboard and mouse. If you don’t have them, borrow or buy them, they are inexpensive!

• Connect the USB keyboard and mouse to the computer.

• Open System Preferences – Bluetooth

• Un-pair the wireless keyboard and mouse.

• Turn off Bluetooth

• Restart the computer in Safe Mode per the directions in https://support.apple.com/en-us/HT201262

• Restart the computer normally.

• Open System Preferences – Bluetooth

• Turn on Bluetooth

• Re-Pair the wireless keyboard and mouse.

• Unplug the USB keyboard and mouse and begin testing the wireless devices again.

If your keyboard has a USB charging cable you can use it to turn it into a USB keyboard. Then try the following:

1. Reset NVRAM or PRAM on your Mac - Apple Support
2. How to reset the SMC of your Mac - Apple Support
3. Boot into Safe Mode and see if the problem persists.

Do you mean your computer will not turn on or is frozen somehow. If it's frozen please try a restart in Safe Mode and then restart normally. Instructions for a Safe Mode restart are in Safe Mode Reset instructions

Well that shoots down that brilliant solution. 😢