Toggle Fn

Toggle the "Use all F1, F2, etc. keys as standard function keys" option in macOS System Preferences.

Tested with:

• MacOS Tahoe, 26.3, February 2026
• MacOS Sequoia, 15.4.1, April 2025
• MacOS Sonoma, 14.2.1, January 2024
• MacOS Ventura, 13.2, January 2023
• MacOS Monterey, 12.6.2, December 2022
• MacOS Big Sur, 11.4, June 2021

Credits

• Original code base provided by @MrSimonC.
• Code optimization by @pernielsentikaer.
• Special thanks to @jcelaya775 for the fix on macOS Tahoe.
• Thanks to @shivraj-roy for the performance boost tip on macOS Tahoe.