It's also built around iCloud and designed to automatically store your images in the cloud and share them across all your devices. Photos is replacing iPhoto, Aperture, and in a way, My Photo Stream. The new app looks great - but also slightly confusing. (Pocket-lint) - Apple has begun rolling out OS X 10.10.3, a free software update for Macs, which brings the new Photos app for Mac, among many other things.