Trying to run FreePGI I get the following popup
Free PGI has detected a configuration problem. You must first agree to the Xcode license before using Free PGI. To agree, type sudo xcodebuild -license in any Terminal window and then restart Free PGI.
So following the instructions I get
rMBP~$ sudo xcodebuild -license
xcode-select: error: tool ‘xcodebuild’ requires Xcode, but active developer directory ‘/Library/Developer/CommandLineTools’ is a command line tools instance
I have never had to install the full Xcode for my other Fortran compilers (intel gcc) that I use only from the terminal/commandline