how to install gcc compiler on mac

In OS X, GCC is part of Xcode's command tools, so first, open the Mac App Store and install Xcode for free.

Then, open Xcode, go to Xcode menu (on the menu bar) > Preferences > Downloads, and install Command Line Tools. You will get commands like gcc, make, purge...

If one does not have the current OS X/macOS command-line developer compiler tools installed with the clang/llvm compilation tools, then homebrew won't be able to spend an hour compiling the less efficient GNU compiler.

You are welcome

Using homebrew u can easily install the latest gcc compiler.

just type this command in the terminal

"brew install gcc@7"