In Premiere Elements 11, does the Mac version have the same slideshow capabilities as the Windows version? If not, how do they differ?
Since your question is (most likely) going to require an answer from someone who owns both versions, you may want to search the user guide
Online User Guide http://help.adobe.com/en_US/premiereelements/using/index.html
-Page to download current PDF http://helpx.adobe.com/premiere-elements.html
In the "Organizer" section of Premiere Elements 11 you CANNOT create a slideshow on mac