GPS2Aperture is the original geotagging application for use with Apple's Aperture and Google Earth.
Visually geotag your images with the help of Google Earth.
Copy GPS positions from one image to another.
View individual image locations in Google Earth.
Go into 'constant update' mode and watch Google Earth automatically fly from location to location as you navigate from image to image in Aperture.
Purchasing a registration key adds the following features:
Automatically geotag your images from your GPS log files.
Retrieve geographic data such as place names and country names.
View multiple image locations in Google Earth.
Visual calibration for camera clocks that were set wrongly.