gcc@13 for Mac

GCC is the GNU Compiler Collection and one of the most established compilation tools in the free software world. It translates source code written in languages such as C and C++ into programs that machines can execute, serving as a key link between writing code and running it. In everyday use, it often appears in terminal commands, working alongside Makefiles or build scripts to complete compilation tasks. gcc@13 refers to a specific version of this compiler collection, suited to development scenarios that require a fixed toolchain version, such as maintaining legacy projects, reproducing build environments, or preserving familiar compilation behavior on a new system. For system developers, embedded engineers, and programmers accustomed to the command line, it is reliable infrastructure; for those just beginning to learn programming, it is also an intuitive entry point for understanding how code becomes a program.