Aperture to PSE, TIF does not work but TIFF OK!

Aperture to PSE, TIF or TIFF.

In Aperture you can specify an external editor which you can use in place of the standard Aperture editor. In my case I currently use PSE (PhotoShop Elements) and I have set the option to use TIFF.

When the external editor is selected for a particular file, a duplicate is made before it is opened in PSE. After editing in PSE the file is saved and replaces the duplicated photo.

TIF or TIFF

Although TIFF is chosen as the type when the file is saved PSE opts to use TIF for its extension (1 F not 2 F's) and this causes a new file to be created and so Aperture does not recognise it as the photo it duplicated and so the changes are not seen. The solution is simple, just add the extra f to TIF before you save the file.