I was wondering if anyone has an answer to this. I just did an erase and install on my iMac and I installed Aperture 2 on my iMac. I clicked it to open it and run the updates on it and it won't open due to compatibility issues. I'm assuming it will be able to be opened in time so I can update it and use it, but does anyone have any idea when? This seems kind of crazy to me that this isn't compatible.