Hmmmm, bit of a real mystery then.
I wonder how long GraphicConverter would take to create the icons?
Enabling image thumbnails in the Finder
- From the Finder, hit command-J (or navigate from the View menu to Show View Options)
- Inside the View Options panel, check the ‘show icon preview’ box
- Close View Options and now you’ll have thumbnails for each image!
By default, Mac OS X shows just a simple icon. This is what you will see with ‘icon preview’ enabled, a thumbnail of the image:
Oh wait, just thought of something else, are you copying a whole folder that has a hidden DS_Store file in that may be holding the icons.thumbnails? If not try using a Folder for transfer!
Those programs seems to create separate thumbnail files as JPG's. My problem is that the system thumbnail, the icon for the images, is just a blank space. There's not even a default placeholder image there, just the text underneath. When I try the 'Show Icon Preview' thing, nothing happens either. I am going to try and install OS X Leopard on my Macbook and try to eliminate variables. My guess is that the metadata is written a different way in Lion than it is in Leopard, so maybe the system is just throwing out the icon due to a discrepancy.
I'm just guessing all of this though.
I just wanted to update this thread and let everyone know how I fixed tis problem. I had to downgrade to Leopard on my Macbook. Once I did that, the thumbnails were now showing up on both computers. The images I had created on my Macbook under Lion were now no longer showing thumbnails after I installed Leopard, so it must be some weird OS compatibility bug.