Official documentation
Karabiner-Elements: Features
Karabiner-Elements project, Karabiner-Elements documentation (pqrs.org), n.d.
Read the originalRead on October 16, 2026
- What it is
- The official feature page for Karabiner-Elements, a free, open-source keyboard remapping tool for macOS. It lists its simple and complex modifications and states the limit on modifying the fn key.
- How much weight it carries
- Official project documentation for a third-party tool, not an Apple product. Its statements describe what the software can change, so they are reliable for the fn key limit. Remapping tools change how keys behave system-wide, so they can also cause the conflicts described in this guide.
Facts taken from this source
- Karabiner-Elements, a free keyboard remapping tool for macOS, cannot modify the fn key on keyboards that are not made by Apple, such as Logitech keyboards.
“Karabiner-Elements cannot modify the fn key on non-Apple keyboards such as Logitech keyboards.” (Page text, sentence on the fn key)