iPhoto 9.6 not loading after Yosemite, Library Converter not working
So did the Yosemite upgrade on my old iMac that was running Mountain Lion (skipped Mavericks on this one) and had the similar problem opening iPhoto that everyone else was having. Tried to upgrade it through the App store, and it still gave me the "iPhoto cannot be opened" problem, so I deleted iPhoto and reinstalled from App Store. Now, it's telling me "to open your library with this version of iPhoto, it first needs to be prepared" and links me to the iPhoto Library Upgrader application. I downloaded and installed that, and when I run it it tells me "you can't open your current photo library using this version of iPhoto. Please quit and use the latest version of iPhoto".
So now I'm stuck in a loop and can't open iPhoto at all. I have backups of the photo library on Time Machine, but not sure at this point what my next step should be.
iMac, Mac OS X (10.6.8), 2008 model, 24"