Software 
iPhoto 9.2, Aperture 3.2: Keychain permissions request may appear when enabling Photo Stream
The following messages may appear in iPhoto 9.2 and Aperture 3.2 if you purchased either application from the Mac App Store, or if iPhoto came pre-installed on your new Mac with OS X Lion.
Aperture: Unexpected results when working with grayscale or other non-RGB images
Adjustments on grayscale images sometimes give unexpected results, or do not work at all.
Aperture 3: Some adjustments are not available on certain images
The Curves and Chromatic Aberration adjustments are dimmed in the Adjustments menu with some RAW images. The Quick Brush menu items are also dimmed, and the individual adjustment brush menu options are missing for these images.
Aperture 3: Dodge or Burn sometimes seem to have no effect
The Dodge and Burn adjustments sometimes seem to have no effect on certain areas of an image.
Expanding GarageBand for Mac (v10.0) content with an in-app purchase
Learn about the option to purchase more GarageBand content.
iPhoto 9.5: Using iPhoto libraries saved to CD or DVD
Learn how to use iPhoto libraries that you saved to CD or DVD in earlier versions of iPhoto.
iWork for iCloud beta: Using Keynote for iCloud beta with Internet Explorer
Learn about the limitations of playing Keynote presentations in Internet Explorer.
iPhoto, Aperture: Changes to VAT when ordering books
Changes to the Value Added Tax (VAT) rules in UK and German VAT legislation have resulted in changes to the prices for ordering books from iPhoto or Aperture.
iMovie 9.0.6, iPhoto 9.3, and Aperture 3.3 OS requirement
iMovie 9.0.6, iPhoto 9.3, and Aperture 3.3 all require OS X Lion v10.7.4 or later.
