![]() If you happened to update your notebook or desktop to an SSD, enabling TRIM is a must for the best long term sustained performance. Overall the process to enable TRIM on an OSX Lion system is rather painless, with the only requirement being that a SSD that supports TRIM is installed. Sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage The second utilizes the backup file created and restores it over the modified one. Enabling TRIM is one of the best ways to maximize the life of your solid-state drive, but OS X doesnt support it out-of-the-box. Copy and paste this code just like the previous command, this step should complete in very little time (seconds or less than a second). Next the code patches the IOAHCIBlockStorage file, removing the requirements that the SSD be made by Apple. 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 Copy and paste the code into the terminal window, a successful or uneventful response is a new blank terminal line. You will be prompted to enter in your system password when using the “sudo” command, since you are modifying system files. The first step makes a backup of the original IOAHCIBlockStorage file called IOAHCIBlockStorage.original. To launch a terminal window, open the Utilities folder inside the Applications folder and select terminal. The guide breaks the process down into three steps, all performed via copying and pasting the code snippets through the terminal window. I worry that if I issue that on my MBA and find that the external ssd does handle TRIM well, then my only choice would be to disable TRIM on all of the drives and thus lose it on my main. Using this guide, we enabled TRIM on the OWC Aura Express Pro 6G 240GB SSD we previously reviewed. I did some online checking and found the OS X trimforce command, but that seems to enable or disable TRIM on all of the drives on any machine it is running on. Note that if you update the system software, you will need to reapply this patch to enable TRIM again. Our guide is based off the instructions digital_dreamer published on the insanelymac forums this summer when Lion was released and later revised by Grant Pannell. This how to guide walks through the process of enabling TRIM support with any SSD in the OS X Lion environment. Thankfully there are a set of terminal commands that may be copied and pasted over to turn TRIM support on for any SSD in the OS X Lion operating system. Were a small team of developers dedicated to crafting amazing experiences for Apple platforms. In fact, Lion offers no simple switch to press to enable TRIM. Cindori develops apps that enhance your Mac experience. If you switch to a non-Apple SSD or upgrade your hard drive to an SSD, TRIM support does not get enabled by default. Apple enabled TRIM support in OS X Lion 10.7 but there’s a catch Apple only allows TRIM to work when using an Apple sanctioned SSD.
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