Mactracker provides detailed information on every Apple Macintosh computer ever made, including items such as processor speed, memory, optical drives, graphic cards, supported OS versions, and expansion options. Also included is information on early Apple systems, Apple mice, keyboards, displays, printers, scanners, speakers, cameras, iPod, Apple TV, iPhone, iPad, Apple Watch, Wi-Fi products, Newton, iOS, Mac OS, OS X, and watchOS versions.
Get even more information on the Developer's Site.
How I Use It
Ian Page, bless his heart, has been maintaining this app for many years. It includes all sorts of information that is very handy when I am both on the phone and in the field. I can always count on it being updated in a timely fashion and it has not failed me yet. Primarily, I use it to quickly research hardware compatibility and upgrade requirements for customer's machine's. Need to know whether or not you can upgrade your new iMac, the information you need is in this application.