[Issue #366] Adding note about 64-bit architecture requirement for AF…

…Networking

README.md

@@ -143,7 +143,7 @@ operation.outputStream = [NSOutputStream outputStreamToMemory];
 
 ## Requirements
 
-AFNetworking requires either [iOS 4.0](http://developer.apple.com/library/ios/#releasenotes/General/WhatsNewIniPhoneOS/Articles/iPhoneOS4.html) and above, or [Mac OS 10.6](http://developer.apple.com/library/mac/#releasenotes/MacOSX/WhatsNewInOSX/Articles/MacOSX10_6.html#//apple_ref/doc/uid/TP40008898-SW7) and above.
+AFNetworking requires either [iOS 4.0](http://developer.apple.com/library/ios/#releasenotes/General/WhatsNewIniPhoneOS/Articles/iPhoneOS4.html) and above, or [Mac OS 10.6](http://developer.apple.com/library/mac/#releasenotes/MacOSX/WhatsNewInOSX/Articles/MacOSX10_6.html#//apple_ref/doc/uid/TP40008898-SW7)([64-bit with modern Cocoa runtime](https://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ObjCRuntimeGuide/Articles/ocrtVersionsPlatforms.html)) and above.
 
 AFNetworking uses [`NSJSONSerialization`](http://developer.apple.com/library/mac/#documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html) if it is available. If your app targets a platform where this class is not available you can include one of the following JSON libraries to your project for AFNetworking to automatically detect and use.