Okay, let's see . . .
Go to
www.versiontracker.com
Type "games" (without quotes) into search text box at top of site. Press return or click the Go button.
Wait a few seconds.
Look at the generated list. Find "Retro Arcade". Click on its name.
Wait a few seconds.
On the new page generated find the "Download Now" link. It's in the center right portion of your window. Click it.
Now, use your mouse to click Safari's "Window" menu at the very top of the screen, next to the Help menu. Then click "Downloads" from the Window menu. A small window should show up. It should show (soon) your progress downloading RetroArcade.
Now look for a little magnifying class icon next to RetroArcade's progress bar in that little window. Click it. Another window should pop up. This is a Finder window (Finder being the main program that draws icons on your desktop and shows you your files). Inside this Finder window you will find RetroArcade highlighted. Wait until it is completely downloaded, and then double-click on it.
RetroArcade is compressed into a special format called "sit". When you double-click on this .sit file, it will create a folder called RetroArcade. It should show up just above the .sit file you just double-clicked. Now, double-click the folder and you'll see inside. Double-click the file called RetroArcade inside that new folder and your should be playing some very old games very soon.
Okay. Not the greatest download out there. But, hopefully you'll get the idea.
There's another important file format: .dmg
.dmg files are disk image files. When you double-click on one, it will put a strange white icon on the desktop. Double-click that strange white icon and you'll find the files inside the disk image. When you have dragged those files to your hard drive (or your desktop or your application folder or wherever), click ONCE on the disk image. Press and hold the Apple key and then press E for eject. The strange white icon will disappear off your desktop.
Please write again if you have questions. I did try each step as I wrote it, but I may not have been clear enough. Good luck and let us know how it works for you. There are a gazillion free games out there.
Doug