Equal for Mac Free to try Side Tree Software Mac OS X 10.4/Intel, Mac OS X 10.5/Intel, Mac OS X 10.6/10.7/10.8 Version 1.1 Full Specs Download Now Secure Download Publisher's Description From Side Tree Software: Equal is a live mathematical expression calculator. As you type, it calculates. It features variables, functions, templates, helpful error messages and remembers open documents. It's easy math, get Equal today! What do you need to know about free software?