how do you check you Linux or Unix kernel version? i like neofetch, which is installed on both Linux and FreeBSD system https://www.cyberciti.biz/howto/neofetch-awesome-system-info-bash-script-for-linux-unix-macos/ and can be installed on macOS too https://www.cyberciti.biz/faq/how-to-install-homebrew-on-macos-package-manager/ ;)