Leopard中kext驱动安装方法（举例）

如安装AppleBCM5751Ethernet.kext驱动

 sudo -s

cp -R AppleBCM5751Ethernet.kext  /System/Library/Extensions /
 chown -R root:wheel /System/Library/Extensions/AppleBCM5751Ethernet.kext
 chmod -R 755 /System/Library/Extensions/AppleBCM5751Ethernet.kext
 kextload /System/Library/Extensions/AppleBCM5751Ethernet.kext
 kextcache -k /System/Library/Extensions/

 diskutil repairpermissions /

 reboot