Note: this is for OSX 10.4 Tiger, if you are on Leopard: tutorial for installing GD support on 10.5 Leopard.
I’m sure the people at Apple had a good reason not to include the GD library in the default apache/PHP installation that comes with OS X. Too bad though, because sooner or later you’ll need it when using OS X as a web development platform. Getting it running is not much like the 1.2.3 installing procedures you are used to on a mac, but here’s how to do it. — Read on
