How can you tell if an app is optimized to use both cores of a dual core processor (or 4 for a quad) besides searching through the publisher's documentation? My theory: if the top command in terminal ever reports that the app is using more than 100% of availible cpu cycles, the app must be optimized to use more than one proc. core. Example: Aperture routinely uses 150+ percent of my processor cycles. (dual core g5). Does this mean it must be optimized for dual core?