I run Snow-lion MacOSX 10.68. I see in system download and install thread that it take a Windows program to install. But Mac is a Fancy Duck floating on a Unix variant. If I run other Linux programs, can't I drop into X II or just terminal? What ought a newbie do?
To use an image file, you will need to unzip it and write it to a suitable SD card using the UNIX tool dd. Windows users should use Win32DiskImager. Do not try to drag and drop or otherwise copy over the image without using dd or Win32DiskImager – it won’t work. If you’re still not clear on what to do, the community on the Raspberry Pi Wiki has written a guide for beginners on how to set up your SD card.