k380-function-keys-conf

MacOS app to make function keys default on Logitech k380 bluetooth keyboard

Instalation

1. Install hidapi library

brew install hidapi

2. Build this app

# suitable for intel chip mac
./build_Intel.sh

# suitable for apple silicon mac
./build_Apple_Silicon.sh

3. Run it as root (Note that you might be asked to give permissions for terminal app to access input device)

sudo ./k380 -f on

Troubleshooting

k380 links against the Homebrew hidapi dylib at runtime, so hidapi must stay installed after building. Homebrew does not know this hand-built binary depends on it, so brew autoremove / cleanup may remove it as an orphan.

If running k380 aborts with:

dyld[...]: Library not loaded: /opt/homebrew/opt/hidapi/lib/libhidapi.0.dylib
  Referenced from: .../k380
  Reason: tried: '/opt/homebrew/opt/hidapi/lib/libhidapi.0.dylib' (no such file)

just reinstall it:

brew install hidapi

To prevent it from being removed again, either pin it (brew pin hidapi) or make the binary self-contained by copying the dylib next to it and rewriting the load path with install_name_tool. See AGENTS.md for the full details.

Based on

https://github.com/jergusg/k380-function-keys-conf