Well, I reinstalled my computer about a month ago and I'm currently taking Computer Gfx at school. Luckily for me, we get to use Adobe Creative Suite CS5, but they are on Macs. The bad news is, I no longer have the plug-in I used to open .psd files. If you aren't familiar with .psd, it's the file extension Photoshop uses default (it supports layers and smart object I believe, among other things).
So my question: can anyone link me to a topic or download for such a plug-in? I know they exist.