Sudo kextcache -m /System/Library/Caches//Startup/Extensions. # rebuild kext cache manually (could take a while) # looks for "Apple" string in HD kext, changes it to a wildcard match for anything # Important: Add "kext-dev-mode=1" as Kernel Arguments or the computer won't boot. 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 # Yosemite: for recovering from stop sign on boot screen, please see However, since that happened before, and Apple has no way to make sure all 3rd party SSD can work flawlessly with TRIM. 'TRIM may cause data lost' is an old problem on Linux, not macOS. Are they up to something with 'disabling system security on El Cap'. It is even better than using the new built in trimforce command, since that requires 10.10.4 and may require disabling system security on El Cap. # Looks for "Apple" string in HD kext, changes it to a wildcard match for anything If you don't turn it on, then the SSD's life span will be shorten. This is the easiest and safest way to enable Trim on OS X.
#Trimforce vs trim enabler update
# Update July 2014: no longer offline, see # Original version by Grant Parnell is offline () # just run "sudo trimforce enable" to activate the trim support from now on!
# UPDATE for 10.10.4: please consider this patch obsolete, as apple provides a tool called "trimforce" to enable trim support for 3rd party SSDs
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