diff --git a/cmake/Mac.cmake b/cmake/Mac.cmake
index 7ef685c48..e02ba97a5 100644
--- a/cmake/Mac.cmake
+++ b/cmake/Mac.cmake
@@ -1,4 +1,4 @@
-set(CMAKE_OSX_DEPLOYMENT_TARGET "10.9" CACHE STRING "Minimum OS X deployment version")
+set(CMAKE_OSX_DEPLOYMENT_TARGET "10.10" CACHE STRING "Minimum OS X deployment version")
 
 # Code signing ID on Mac.
 # If this is falsey, codesigning is disabled.