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However, it is possible to install the GNU compiler collection (GCC) and use g++ with that compiler instead. This can be done by installing GCC using Homebrew or MacPorts, and then specifying the path to the GCC version of g++ when compiling your code.
For example, if you have installed GCC using Homebrew, you can use the following command to compile your code with g++:
/usr/local/bin/g++ yourfile.cpp
If you want to make sure that you are using the GCC version of g++ by default, you can create an alias in your shell profile:
alias g++="/usr/local/bin/g++"
This will make the system use the GCC version of g++ whenever you type g++ in the terminal.