Wow, it's a busy day at Apple. First we had the iOS 6.0.1 release, then developers got the iOS 6.1 beta and a new version of Xcode, and now Apple's dropped iPhoto, Aperture, and Safari updates for the Mac.
iPhoto received a bump to version 9.4.2, with a surprising number of new features and fixes. Many of the changes have to do with shared Photo Streams, but the app has also been updated to improve stability, fix an issue when sending photos using Microsoft Outlook from iPhoto, and add more holidays for use on printed calendars.
Safari 6.0.2 is a security update. At the time of publication, Apple's security update page had not been revised to show what changes had been made.
Finally, Apple's pro photography app Aperture has been updated to version 3.4.2. As with iPhoto, many of the changes are focused on shared Photo Streams. Other fixes dealing with the handling of RAW files and stability have been added. For more information about this update, visit the App Store page for Aperture.
All of the updates are available immediately under the software update tab of the Mac App Store.