Aperture customers can now install the Aperture 1.5.6 Update, either by running Software Update or by visiting the Aperture Download page. Recommended for all those using Aperture, the Aperture 1.5.6 Update addresses issues related to performance, improves overall stability, and supports compatibility with Mac OS X v10.5. The update should be installed before first use of Aperture with Mac OS X Leopard.