Can't empty iPhoto trash
I've seen a couple of postings on this but it doesn't solve my basic problem.
I recently bought a new Macbook and tried to transfer photos from my old computer to my new one. I'm not sure what I did as I started the transfer before going to bed one night, but it ended up tranferring (or creating, via duplicates) over 100K photos into my new iPhoto. This was obviously a mistake so I decided to delete everything and start over (all of my photos are safely in iPhoto on my old computer). However, even though I have "deleted" all of the photos, they are still on my computer hogging up space...because I can't empty the trash folder in iPhoto.
How do I recitfy this? Do I just delete iPhoto altogether and reinstall it? Is there any other way I can get to these "hidden" files and delete them permanently from the hard drive? They are also slowing down my computer - when I open it up in the morning, the screen is "greyed out" - I have to wait for a status bar to complete to get the screen back to normal. Then I have to wait at least a minute before I can even move the cursor (the wireless will disconnect and reconnect during this process).
MacBook, iOS 6.1.2