This one is a pretty minor update, but important if you print a lot of photos from the app. The update fixes an issue that the company says could cause print previews to render incorrectly. The release notes also offer stability and performance improvements. The download is about 55MB and a free update to all current users. iPhoto for OS X costs $15 from the App Store, but is free for those who own iPhoto ’11 or who’ve purchased a new Mac recently.