I have Photoshop CS5.1 and it has stopped opening my RAW files from my Rebel T4i. It was working the other day just fine. I have tried to download the plugins that othes said will make it wotk; but nothing has worked so far. Also, it said that all my updates are up-to-date. Can someone help me figure out what plugin I need for make this work again?
On that list it says that it requires ACR 7.1 with CS6/ LR4.1 respectively, so whatever allowed you to open those files was possibly a trial version of these products that allowed the components to work. Short of buying one of the two it will never work natively in CS5.