Apple iPhoto - Drag & Drop
Apple iPhoto is not compatible with all Browser based applications. Apple iPhoto prevents photos from being drag & dropped into any web browser.
There are a few workarounds for Apple iPhoto locking your photos:
- Drag & Drop from iPhoto into Finder. Drag & Drop from Finder into PicThrive.
- Don't Use iPhoto, or don't use Drag & Drop
- Turn off iPhoto copying the files into its private storage.