[Readme] Updated system requirements

Readme.md

@@ -15,14 +15,14 @@ Please read the [FAQ](https://dolphin-emu.org/docs/faq/) before using Dolphin.
 * OS
     * Windows (7 SP1 or higher is officially supported, but Vista SP2 might also work).
     * Linux.
-    * macOS (10.9 Mavericks or higher).
+    * macOS (10.10 Yosemite or higher).
     * Unix-like systems other than Linux are not officially supported but might work.
 * Processor
     * A CPU with SSE2 support.
     * A modern CPU (3 GHz and Dual Core, not older than 2008) is highly recommended.
 * Graphics
-    * A reasonably modern graphics card (Direct3D 10.0 / OpenGL 3.0).
-    * A graphics card that supports Direct3D 11 / OpenGL 4.4 is recommended.
+    * A reasonably modern graphics card (Direct3D 11.1 / OpenGL 3.3).
+    * A graphics card that supports Direct3D 11.1 / OpenGL 4.4 is recommended.
 
 ### Android