Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Downgraded OS from Mavericks to Mountain Lion, how to get Aperture to work on Mountain Lion?

Downgraded OS from Mavericks to Mountain Lion, how to get Aperture to work on Mountain Lion? My iMac (Intel) is older and Apple told me this model doesn't handle Mavericks well, recommended I step back to Mountain Lion, which was where Aperture was originally used. Aperture was upgraded when I installed Mavericks, need to go back to older version. How?