Only the kernel is BSD licensed, other tools in user land are GPL. Don’t be dense.

This is a wonderful self-own.

Perhaps the person you are responding to is dense enough to know that Apple uses a BSD licensed userland: https://github.com/apple-oss-distributions/file_cmds

Or perhaps they know that the entire system is built with Clang and LLVM and not GCC.

Apple distributes very little GPL code (like bash) and even then it is only GPL2 (older versions).

BSD utils in macOS are BSD licensed.