After announcing Aperture 1.5 at Photokina earlier this week, Apple today released the Aperture 1.5 update for download.
The software, which is a free upgrade for existing Aperture users, is available for immediate download at Apple's website: http://www.apple.com/aperture/download/
For further information on what updates Aperture 1.5 contains, please check our previous coverage.
Users should note that Mac OS X 10.4.8 (which was released earlier today) is required for this update.