badgerforpresident

Hi guys - I have a noob question that I'm hoping somebody can help me with. I'm trying to install the RSS mod on Mac OSX via CKAN/Mono, but when I select the RSS and texture pack checkboxes, the "Apply Changes" option at the top of CKAN is greyed out. Am I missing something? My KSP version is 1.0.5, which apparently is supported by the mod.