diff --git a/Building-Transmission.md b/Building-Transmission.md
index 0c6e180..cb57caf 100644
--- a/Building-Transmission.md
+++ b/Building-Transmission.md
@@ -19,8 +19,8 @@ $ git clone https://github.com/transmission/transmission.git
 ## On Mac OS X ##
 
 Transmission has an Xcode project file (Transmission.xcodeproj) for building in Xcode. Make sure you have this software:
- * OS X 10.8 or newer
- * OS X 10.8 SDK
+ * OS X 10.10 or newer
+ * OS X 10.10 SDK
  * Xcode 4.4 or newer
 
 Building the project on Mac requires the source to be retrieved from GitHub. Pre-packaged source code will not compile.