Thanks! I think I screwed up the source_files regex in the Podfile. Have pushed a new pull request to the Cocoapods repo, hopefully will be fixed soon.

Update: There's a transitioning period currently ongoing at Cocoapods (migration to Cocoapods Trunk). For now please use the updated podspec in the github repo directly:

pod 'MMLayershots', :podspec => 'https://raw.githubusercontent.com/vpdn/MMLayershots/master/M...