For now require 10.10

SnapKit.podspec

@@ -9,7 +9,7 @@ Pod::Spec.new do |s|
   s.source = { :git => 'https://github.com/SnapKit/SnapKit.git', :tag => '0.14.0' }
 
   s.ios.deployment_target = '8.0'
-  s.osx.deployment_target = '10.9'
+  s.osx.deployment_target = '10.10'
 
   s.source_files = 'Source/*.swift'