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
