You can change F key functions on your Mac keyboard from enhanced mode to standard mode using Logitech Control Center (LCC) mouse and keyboard software for Mac.

NOTE: If you don't already have LCC installed, you can download it. See answer 360023245674 for instructions.

To change F key functions:

1. Launch the Logitech Control Center

   Apple Menu > System Preferences > Other > Logitech Control Center

   

2. In the Logitech Control Center window, double-click the picture of the keyboard you want to modify.

   

3. In the "General" tab, select the following option:

   

4. When you're done, close the Logitech Control Center to exit.

NOTE: You can change F key functions back to enhanced mode by repeating the steps above and clearing the check box shown in step 3.