Check Software Update to get it. You’ll also find iPhoto, iLife and iMovie updates.

About Aperture 2.1.1

The Aperture 2.1.1 update provides compatibility with MobileMe and addresses issues related to performance and overall stability of Aperture 2. The update includes fixes that affect several features, including:

• Auto-stacking
• Preview generation
• Adding keywords
• Comparing images
• Importing and exporting projects
• Crop HUD
• Histogram
• Highlights & Shadows controls
• Dodge & Burn plug-in
• Lift & Stamp HUD
• Exporting versions
• Slideshows
• Adjustments pane and Adjustments HUD
• Printing
• Book themes
• Help menu

This update supports general compatibility issues, improves overall stability, and addresses a number of other minor issues.

This update may ask you to re-enter your serial, name and organization.