Update SwiftOSC.podspec

Author: devinroth

SwiftOSC.podspec

@@ -29,6 +29,7 @@ SwiftOSC is an Open Sound Control client and server framework written in Swift.
   # s.social_media_url = 'https://twitter.com/<TWITTER_USERNAME>'
 
   s.ios.deployment_target = '8.0'
+  s.osx.deployment_target = '10.11'
 
   s.source_files = "Framework/iOS/iOS", "Framework/**/*.{c,h,m,swift}"