The rtl_433 that comes bundled with Homebrew on macOS does not support SSL. Which means that we need to compile it from source. It is rather straight forward to do so. Uninstall rtl_433 If you already have rtl_433 installed via Homebrew it should be removed first. brew uninstall rtl_433 Dependencies brew install cmake pkg-config openssl@3 Compile from Source git clone https://github.com/merbanan/rtl_433.git cd rtl_433 mkdir build cd build cmake -DOPENSSL_ROOT_DIR=$(brew –prefix openssl@3) .