Aperture 3 Merging
The handling of multiple changes is astonishingly good. Let’s say you crop photo_01 in the desktop library, and adjust exposure on photo_02 in the mobile library. Then let’s say in that mobile library, you add metadata to the same photo_01 file that was cropped in the desktop library. When you merge the libraries, everything is synced correctly—the desktop-cropped photo_01 will gain the metadata added to the same photo_01 in the mobile library; the exposure adjustment on photo_02 will be applied.
