No research on SSDs, colleagues suggest that Apple on the unofficial SSD does not open trim, the Internet is a, to trim unknown.
First, Trim is going on: http://bbs.feng.com/read-htm-tid-1870887.html
Second, open the unofficial SSD trim:http://bbs.feng.com/read-htm-tid-8997023.html
Its method is very simple, according to gourd painting scoop can.
sudo nvram boot-args="kext-dev-mode=1"Restart 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.baksudo 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/Ioahciblockstoragesudo Touch/system/library/Extensionssudo Kextcache-prelinked-kernel/system/library/caches/com.apple.kext.caches/startup/kernelcache-k/System/Library/Kernels/ kernel/system/library/Extensions Restart
Open 10.10.3 on SSD trim-Black Apple Road