![]() ![]() If you are stuck with a gray boot sign, the easiest way to recover is to reinstall macOS: If you used an older version of Trim Enabler and can't start your Mac To avoid this situation, use Trim Enabler 3.4 or later, or the new Disk Sensei app. If you try to use an older version of Trim Enabler (3.3 or earlier), you could end up with the “grey stop sign” screen when trying to boot. These apps will never cause any "grey screen" issues. ![]() You can now enable Trim safely using Trim Enabler 3.4 or Disk Sensei. #Trim enabler en mac driver#After discussions with Apple representatives, we were also granted an official kext certificate to ensure that our driver would load safely on Yosemite and all future versions of macOS. Enabling Trim safelyĪfter this issue occurred we sat down and developed our own custom driver to enable Trim in Mac computers. This method of enabling Trim could render users systems unable to boot. Trim Enabler 3.3 and older versions worked by modifying the system driver responsible for disk management. If a driver has been modified, Yosemite will no longer load it. In my case, it says YES because I have already enabled TRIM. In the description, you’ll see a line telling you whether TRIM support is present or not. If you would like to disable TRIM, you can use the command sudo trimforce disable. Carefully read the important notice and if you still wish to proceed, hit Y. Type sudo trimforce enable and hit return or enter. Kext signing works by using Apple-granted signatures to verify system integrity. Find the SATA section in the menu and locate the hard drive you want to enable TRIM on. Open the Terminal from /Applications/Utilities. In OS X 10.10 (Yosemite), Apple introduced a new security requirement called kext signing. Issues with enabling Trim in macOS Yosemite Kext Signing ![]()
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