This explains the set up of our very basic status screen to displays Google calendars here at booncon.
Download and put the most current https://www.raspberrypi.org/downloads/raspbian/ image to an SD Card. On OSX that works great with http://www.tweaking4all.com/hardware/raspberry-pi/macosx-apple-pi-baker/, just use the restore option and select the unzipped image file.
After the first boot, the raspi-config
utility should load up.