I upgraded to OSX Mavericks today on my MacBook Pro (it's a 2011 model). One of the items that wanted to update was iPhoto, so of course I did that. When it was done, I couldn't get it to open. Instead, I got this message:
"The iPhoto Library is locked, on a locked disk, or you do not have permission to make changes to it. iPhoto can try to repair the permissions."
Withe option to repair it. After I clicl on the repair button (and a briefe stint with the beachball), I get this message:
"The iPhoto Library is locked, on a locked disk, or you do not have permission to make changes to it."
iPhoto was working fine before. I checked the Get Info on the iPhoto Library file and it says that I have Read & Write permissions. I clicked on the gear icon at the bottom and was given the choice to make Me the owner of this file, so I clicked that. Then I tried the whole thing over again with the same result.
The odd thing is that Aperture appears to work just fine.