You need to be patient however when running the Gem install and when downloading.
- Download and unzip in a directory
- Open Terminal
- cd to the unzipped script directory
- run the sudo gem install and wait wait wait ...
sudo gem install wwdcdownloader --no-rdoc --no-ri
16 gem installed
- Create a directory for the wwdcsamples
- Run the script as indicated in the documentation
$ wwdcdownloader DevAppleID wwdcsamples