PPSM - PowerPoint Open XML Macro-Enabled Slide Show files are created with Microsoft PowerPoint, a part of the Microsoft Office suite. Powerpoint is used to create presentations and slideshows. The PPSM file presentation slides and information in a format that makes it uneditable.
These PPSM files contain macros to be executed by PowerPoint allowing for the viewing of the presentation. These should not be confused with the PPSX files. PPSX files will not be executed by PowerPoint even if they contain macros, unless they are changed to PPSM format.
The PPSM file can be opened in PowerPoint 2007 and later, and may be opened in earlier versions if they support Open XML documents.