Microsoft Office for Mac file
File type: Various data file
An .msof file is a data file associated with Microsoft Office for Mac. It is not a standard user document format.
File type category:
Various data file
Date updated: September 27, 2026
The MSOF file extension is associated with some versions of Microsoft Office for Mac. The exact purpose and contents can vary according to the version of Office for Mac that created the file.
The format is associated with Microsoft's Office software for Mac OS X and macOS and may contain application data rather than document content.
Open an .msof file with Microsoft Office for Mac, if the version that created the file provides an open command for it. MSOF files may be internal application data and may not be intended for direct opening.
If Microsoft Office for Mac does not recognize the file, there may be no supported standalone program for opening it. Do not rename it to an Office document extension.
There is no general-purpose conversion method for an .msof file. If Microsoft Office for Mac can open or expose the data, use that application to export it in an available format.
Because MSOF files may contain application data rather than document content, they may not be suitable for conversion.
Software applications that handle other tasks involving msof files:
Apple macOS / Mac OS X
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