Files with mc extension are related to Modula-3 a programming language designed by Digital Equipment Corporation (DEC).
MC file extension - Modula-3 M3CG intermediate language data
What is mc file? How to open mc files?
File type specification:
File extension mc is associated with the Modula-3, a programming language conceived as a successor to an upgraded version of Modula-2. While it has been influential in research circles it has not been adopted widely in industry.
A typical .mc file stores intermediate language data used by Modula-3 language.
This mc file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.