According to the official specs, GPSPhotoLinker is not compatible with Mac OS X Mavericks 10.9. The official supported versions of Mac OS X are as follows: Mac OS X 10.6, 10.7, and 10.8. For more information about the product, I recommend you to visit its official website. Additionally, use your favorite email service to send an email to the developers where you can ask about a possible Mavericks release.