Mac computers can use Keynote to make slides and use other methods to make ppt. Here is how Keynote creates PPT.

Step 1: Open Keynote, create a new blank document, or select a theme;

Step 2: Add words or charts and so on according to your own needs;

Step 3: After making, press and hold "Command+S" to save.

Step 4: If you want to create PPT quickly, you can also use the Mac right-click tool to create a new PPT file with one click.