I have Photoshop CC 2015 but miss the filter Oil Painting. How can I download Photoshop CC on my iMac so that I can also access it when working on photos? I understand that's a lot of space for one filter but I love Oil Painting.
When you go to the Creative Cloud to download, you can specify previous versions. Photoshop CC and CC 2014 and CC 2015 can all peacefully coexist on the same machine, though you'll eat a LOT of space. That said, I believe you need to tweek a setting in the installer if you install CC 2015 last -- it has an option (defaults to ON) that removes the older version in order to save hard drive space for the user.