Fail when using the 10.11 SDK on a host running a version older than 10.11. Fixes RM-957
Fail when using the 10.11 SDK on a host running a version older than 10.11. Fixes RM-957

katsuyoshi/RubyMotion,hboon/RubyMotion,HipByte/RubyMotion,HipByte/RubyMotion,hboon/RubyMotion,katsuyoshi/RubyMotion,katsuyoshi/RubyMotion,HipByte/RubyMotion,katsuyoshi/RubyMotion,hboon/RubyMotion