There is only one file type that uses the .MGCB extension:
Equation Illustrator Project File
Technical illustration created by Equation Illustrator, a program used to draw equations and diagrams; contains text, symbols, and vector graphics; commonly used for mathematical formulas or equations, as well as some technical diagrams.
Equation Illustrator can export MGCB files to .BMP, .JPG, .GIF, .PNG, .EMF, and .WMF formats.
|MGCSoft Equation Illustrator||Free Trial|
Updated: September 6, 2010