Photo library applications cache metadata of managed photos.
You need to trigger the reloading of metadata. In iPhoto,
this feature is named “Rescan for Location”. In Aperture, you
will use “Reload Metadata from EXIF” / "Reload from Master".
Integration with Lightroom requires Lightroom to store
metadata in XMP sidecar files. Once HoudahGeo has updated the
sidecar, you will instruct Lightroom to "Reload Metadata from
File".
HoudahGeo is able to detect photos managed by iPhoto'09 and
offers to notify iPhoto of changes upon writing EXIF tags.
For this feature to work, you must:
- Use the latest version of iPhoto'09
- Have iPhoto library pre-loading enabled in
HoudahGeo
- Choose to tag masters/originals
- Not have HoudahGeo create copies
- Not have HoudahGeo create XMP sidecars
Also, there should not be any existing XMP sidecars.