Make sure that the option Ignore system settings for F1-F12 is turned on. If not, enable it and restart Commander One. 


2.  When opening the app for the first time or after proceeding step 1 you will receive the following warning message:


3. Click Open System Preferences button.


4. In the invoked window click on the Lock icon in the lower-left corner and type the password.


5. Find Commander One.app from the list and put a tick in a checkbox next to it. 


In case, if all of a sudden, F1-F12 keys stopped working, proceed with the following steps:

  1. Go to System Preferences→Security & Privacy→Accessibility


2. Click on the Lock icon in the lower-left corner and type the password.


3. Find Commander One.app and remove it from this list by pressing the button "-".


4. Restart Commander One and proceed with the steps 1-5 above.