I have problems with my macport after update to OS X 10.9.
I try to follow this manual https://trac.macports.org/wiki/Migration to fix them.
But when I inst
For OSX 10.11 or more you can download from here https://developer.apple.com/download/more/.
(The link in the accepted answer doesn't display command line tools for El Capitan (OSX 10.11))