Update README.md

Author: Goldfish64

README.md

@@ -9,7 +9,7 @@ English (Current)
 [简体中文](README_zh.md)  
 
 #### Features
-- Supports 64-bit macOS 10.6 and newer (10.9 and newer is recommended)
+- Supports macOS 10.4 and newer (10.9 and newer is recommended)
 - Implements MMIO protocol and interrupt-based responses for compatibility with modern OS
 - Properly reports key attributes and r/w protection in the keys
 - Allows tuning on per-model basis and allows to use different SMC generations