I have a problem with a swipe back in Safari. On my MacBook I could fix it by resetting of NVRAM. I can't find out how to do it on iMac with a Bluetooth keyboard. Do I really need a cable keyboard in order to reset it?
This can be reset using Terminal.
Launch Terminal from the Utilities folder
Run the command:
sudo nvram boot-args=”-p -r”
Type your password
Press Enter again
Restart your computer
After a restart it should be reset.