Mpix can be used on both Windows and Macintosh platforms. Following are the specific requirements for each platform: Operating System: Windows 2000 or higher; Macintosh OS X Browser: Internet Explorer 5.0 or higher; Netscape Navigator 6.2 or higher.* Monitor Resolution: 800x600 resolution is required Picture format: Digital pictures are accepted in JPEG format. Macintosh users: In order to use the Mpix Image Upload Plugin, you will need to have the Java Runtime Environment (version 1.3 or higher) and Quicktime (version 5 or higher) installed on your machine. These programs come installed as defaults on Macintosh OS X and usually do not require any additional configuration. Mac users will also need to have scripting and plugins enabled in their browser. *The Mpix Image Upload Plugin is not available in Netscape browsers.