|If your current operating system is Mac OS 7.5 to 9.x, the PowerPoint Viewer is available as a free download:
|Microsoft currently does not support a PowerPoint Viewer for Mac OS X. For users with this operating system, we recommend downloading OpenOffice.org. This program is a free download that will allow you to view PPS, PPT, or PPTX files.
|Users with Mac OS 10.4 or higher will need to download and install OpenOffice.org version 3.4.0: