I never had any major problems with aperture until I recently did a format/reinstall. I decided to upgrade to 10.7.3. That went all find and dandy until I went to install aperture. I get an error (see attachment) After what seemed like days of googling I stumbled upon this post. http://www.macrumors.com/2012/03/19/apple-releases-software-installer-update-1-0-for-mac-os-x-10-6-8/ This got me wondering, so before I got too far, I formatted again and went back to snow leopard 10.6.8. Turns out I wasn't able to install aperture until I got the apple software update they put out for "may prevent certain apple software from installing". So now I am kinda stuck, I want to upgrade to lion(sort of) but if it doesn't work I won't do it, but why shouldn't I be able to do so and still install aperture 3.1? Is there an update out there for lion that will allow to do this? I tried downloading the update for snow leopard 10.6.8 and tried running it on 10.7.3, but of course they have a software check to make sure you are running the correct version and it won't proceed. please help! ?