A recent update to both iPhoto and Aperture now allows both applications to share photo libraries for the first time. As noted by Apple, “All your photos stay together. And you get the best of both applications.”
Having a shared library is extremely useful for those who use both iPhoto and Aperture. No longer will you have to import and export photos for both applications in order to keep your libraries up to date. Many people like the advanced editing capabilities of Aperture, but enjoy the simplicity of managing photos with iPhoto, so this update will undoubtedly please many who are fans of both apps.
iPhoto 11 (version 9.3), and Aperture 3.3 are both available in the Mac App Store for purchase.