Because flash memory cells can only be written to a certain number of times, solid state drives technically have a limited lifespan, moreso than their disk drive predecessors. This leads me to address the elephant in the room, which is longevity. But now that those prices are dropping, SSDs come standard on most new computers, and even more people are replacing their old hard drives with modern solid state alternatives. The advantages of SSDs are clear: they’re exponentially faster, they’re entirely silent, they’re more durable, and they’re immune from issues like fragmentation.Īs with any new technology, they were fairly rare until recently because of their high prices. Unlike their disk-based predecessors, SSDs are more like a series of very high performance USB keys squished together. It’s like having a series of very high performance USB keys squished into a box. ![]() This is broadly true, and I will show you how to check for and enable TRIM support on your drives, but first it’s important to take a step back and understand what we’re talking about.Īn HDD encodes data onto a magnetic coating on a spinning disk inside the drive.Īn SSD, on the other hand, is just a network of flash memory cells assembled into a drive enclosure, meaning it has no moving parts. You’ve probably heard that SSDs have a lifespan, and that you can prolong that lifespan by enabling something called TRIM. ![]() How to Check and Enable TRIM on a Mac SSD SSDs vs. If you happened to update your notebook or desktop to an SSD, enabling TRIM is a must for the best long term sustained performance.How to Check and Enable TRIM on a Mac SSD ![]() 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. 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.
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