Even if you do not have Microsoft Office installed on your Mac computer, you can still create presentations that are compatible with the PowerPoint program. With the Keynote application, part of the iWork suite of programs, Mac users can design slides and slideshows and then export their presentations as PowerPoint documents. These slideshows can then be viewed and edited on any computer with PowerPoint installed on it.
Open the Keynote application by clicking on its icon in the Dock.
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Select a theme for your presentation from the list of options and then click on the "Choose" button.
Click on the "New" button in the upper-left corner of the application windows to create a new slide in your presentation.
Use the text, shape and media options in the top menu bar to add different elements to your slides.
Go to "File" in the top menu bar when you are finished designing your presentation and choose the "Export" option.
Select "PowerPoint" in the pop-up window and then click "Next."
Type in a name for the presentation and decide where to save it. Then click "Export." This will convert your presentation to a PowerPoint compatible file and save it to the location you selected.
Things You'll Need
Mac running OS X 10.4 or later
iWork '08 or later