I am now working in CS6 and require a number of render settings that I have used in CS5. I was hoping for an easy fix to be able to utilize my (10-15) different settings from CS5 in CS6, but I have not found a solution just yet. Does anyone know of a quick way I can import these settings (either through the Finder on OSX or from within AE)?
Nope. This stuff can't be saved and since it has changed in CS6 once again it would not be compatible, anyway. Simply sit down for half an ahour and rebuild it.
If you are referring to Render Settings templates and Output Module templates, yes, you can transfer them between versions.
In AE CS5, go to Edit > Templates > Render Settings or > Output Module. Click the Save All button in the lower left. In AE CS6, do the same but click the Load button and choose the file you saved from CS5.
You will likely get a warning message about duplicate template names, due to the default templates from CS5 being a part of the package.