Yeah, I was surprised today to discover wget is not installed by default on MacOS 10.8.
Luckily the available solutions are fast and simple:
1. The faster one: use cURL ( curl -O http://www.something.org/file.txt )
2. Install wget. And for this you can either use a package manager or proced the hardcore way, which in this case is pretty easy: compile wget yourself.
– guide to compile wget: http://osxdaily.com/2012/05/22/install-wget-mac-os-x/