Please slide the system toggle to the right mode to match your device. If you are a Mac user, please switch the toggle to 'Mac' mode. To enable the function keys on your Mac, please go to system settings ➡️ Keyboard ➡️ enable the function keys.
For the F5 and F6 as functions on macOS, please hold fn + K + C for 4 seconds. (Refer to K8 Quick Start Guide Step 4 for more details.)