I have command line tools installed: % pkgutil --pkg-info=com.apple.pkg.CLTools_Executables package-id: com.apple.pkg.CLTools_Executables version: 16.2.0.0.1.1733547573 volume: / location: / install-time: 1739567437 Thus clang is installed here: % whereis g++ g++: /usr/bin/g++ I also have installed gcc from homebrew: % /opt/homebrew/bin/g++-14 --version g++-14 (Homebrew GCC 14.2.0_1) 14.2.0 Copyright (C) 2024 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. However, I still cannot compile any c++ code, even the simplest one: #include <iostream> using namespace std; int main() { cout << "Hello World!" << endl; return 0; } It returned this error: % /opt/homebrew/bin/g++-14 ~/Downloads/try.cpp ld: unsupported tapi file type '!tapi-tbd' in YAML file '/Library/Developer/CommandLineTools/SDKs/MacOSX15.sdk/usr/lib/libSystem.tbd' for architecture arm64 collect2: error: ld returned 1 exit status It seems to be command line tools related. But I've already installed the most recent version of CLT and gcc. Additionally, clang can compile the same code: % /usr/bin/g++ ~/Downloads/try.cpp % ./a.out Hello World! What else shall I do to make this g++ compiler work?