打开10.10.3上SSD的TRIM-黑苹果之路

　　对SSD没有研究，同事提出苹果对非官方的SSD不开启TRIM，上网度了一把，对TRIM不明觉厉。

一、TRIM是怎么回事：http://bbs.feng.com/read-htm-tid-1870887.html

二、打开非官方SSD的TRIM：http://bbs.feng.com/read-htm-tid-8997023.html

　　其方法很简单，依葫芦画瓢即可。

sudo nvram boot-args="kext-dev-mode=1"
重启

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.bak

sudo perl -pi -e 's|\x00\x41\x50\x50\x4c\x45\x20\x53\x53\x44\x00|\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00|' /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage

sudo touch /System/Library/Extensions

sudo kextcache -prelinked-kernel /System/Library/Caches/com.apple.kext.caches/Startup/kernelcache -K /System/Library/Kernels/kernel /System/Library/Extensions

重启