1. TRIM can be enabled by using the following Terminal commands. Copy these commands and run them in Terminal:
  2. Backup the file that you’re about to patch:
  3.  
  4. sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage /IOAHCIBlockStorage.original
  5.  
  6. Patch the file to enable TRIM support:
  7.  
  8. sudo perl -pi -e 's|(\x52\x6F\x74\x61\x74\x69\x6F\x6E\x61\x6C\x00).{9}(\x00\x51)|$1\x00\x00\x00\x00\x00\x00\x00\x00\x00$2|sg' /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage
  9.  
  10. Clear the kext caches:
  11.  
  12. sudo kextcache -system-prelinked-kernel
  13. sudo kextcache -system-caches
  14.  
  15. Important: reboot your Mac!