Microsoft Project for Mac file
File type: Various data file
A Microsoft Project for Mac file is a project file created by Microsoft Project for Macintosh.
It contains data for a project managed in the Macintosh version of Microsoft Project.
File type category:
Various data file
Date updated: September 28, 2026
The MSPJ file extension is associated with Microsoft Project for Macintosh, Microsoft's project management application for classic Mac computers. An MSPJ file is used to store project information for that software.
Microsoft discontinued further development of Microsoft Project for Macintosh in 1994. The format is therefore a legacy format and is no longer part of an actively supported Mac version of Microsoft Project.
Open an MSPJ file with a compatible version of Microsoft Project for Macintosh. This software was made for classic Mac OS and is no longer supported, so it will not run natively on current macOS systems.
Current versions of Microsoft Project may not open MSPJ files directly. If the original software is unavailable, opening the file may require an older Mac environment or a system capable of running that software.
If the file can be opened in Microsoft Project for Macintosh, use that application to export or save the project in a format supported by another project-management program.
If the original application cannot open the file, conversion may not be possible without first recovering access to a compatible classic Mac environment.
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