This is the Digital Camera Forum and we don't usually get into software program problems.
I suggest you post your question on the General Mac software discussions Forum.
Here is a link to that Forum:
http://forums.cnet.com/mac-forums/general-mac-software-discussions-forum/?tag=mncol;10f
..
I transfered photos to my iPhoto and some of them disappear. They're there but unless you want to edit them you can't see them...

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