On Apple keyboards we don't have an Insert key, and this is most annoying when using the command line or CLI tools like Midnight Commander.
We can fix this by re-assigning the F12 key:
- Remove F12 as key from System Settings->Mission Control
- Enable Use F1, F2, etc. keys as standard function keys in System Settings->Keyboard->Keyboard
- Go to Terminal->Preferences and set the default profile as Pro
- Go to Terminal->Preferences->Profiles->Keyboard and Replace F12 code with