Master Grade gradebook
File type: Various data file
A .mgd file is a gradebook file created and saved by Master Grade from Maxium Developments.
It stores gradebook data for use in the Master Grade gradebook application.
Found 2 different file type records with the same mgd filename suffix.
File type category:
Various data file
Date updated: October 12, 2026
The mgd file extension is associated with Master Grade, a gradebook application from Maxium Developments. The software was actively developed between September 1999 and February 2015.
An .mgd file contains a gradebook and its associated records, such as student and grade information. It is the native file format used to save gradebooks in Master Grade.
Master Grade was available for Apple Mac OS X and macOS.
It seems that you can open .mgd files only using Master Grade on Apple macOS or Mac OS X.
In the application, use its file-opening command and select the gradebook file.
There doesn't seem to exist any way to export or convert .mgd files to anything else.
Software applications that can open mgd files:
Apple macOS / Mac OS X
File type category:
Emulator file
Date updated: January 18, 2023
File extension mgd is related to the emulators of Sega Genesis, also known as Sega Megadrive, a 16-bit video gaming console released in 1988.
A .mgd file contains ROM image from one of the Sega Genesis consoles.
Use Kega Fusion and other emulators to open .mgd files.
Can be exported to other similar ROM formats with SBWin.
Software applications that can open mgd files:
Microsoft Windows
Software apps that import mgd files:
Microsoft Windows
Software apps that export mgd files:
Microsoft Windows
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