Mac users interested in Presto page viewer generally download:
Improve the productivity in your organization with Presto! PageManager 9 SE.
Presto! PageManager is Ease-of-use, Front-end, Page Processing software. It now has faster thumbnail previews, a wider range of file formats, and the ability to stack variously formatted documents. The design concept incorporates “Capture”, “Manage”, and “Share & Deliver” solutions.