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MAC OS X 10.9.4 10.9.5 下用命令行开启 SSD trim 的方法 老方法失效

10.9.1-10.9.3 方法见：https://lvwenhan.com/MAC/391.html

本方法只适用于10.9.4、10.9.5：

1. 备份

sudo cp \
  /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage \
  /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original

2. 修改文件

sudo perl -p0777i -e 's@((?:Rotational|WakeKey\x0a)\x00{1,20})APPLE SSD(\x00{1,20}[QMT])@$1\x00\x00\x00\x00\x00\x00\x00\x00\x00$2@' \
  /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage

3. 创建系统内核拓展文件夹

sudo touch /System/Library/Extensions/

4. 重启

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