Can Preview on Mountain Lion make animated pictures from a sequence of PNG? I seem to recall making animated GIF from Preview.app on earlier OS, but can't find the options to make a GIF on the latest version of the app.

Can I use 10.8 Preview to make animated PNG or GIF?
If you hold down alt/option when you click the format dropdown in the export menu, you can still select GIF in Mountain Lion. Once you have done this, you can continue with the normal animated gif creation process:


Save your image as a GIF
Show the sidebar
Drag additional frames on top of the thumbnail