![]() ![]() We’ve enabled it on a pair of older Macs in the Orbiting HQ with aftermarket SSDs in them, and so far we’ve had no issues-giant scary warning notwithstanding. Called trimforce, the utility can be executed from the OS X terminal, and it requires a reboot to start working. In order to enable TRIM, you can open the Terminal application on your Mac, type in the command sudo trimforce enable, and then enter your admin password to. With today’s OS X 10.10.4 update, however, Apple has added a command line utility that can be used to enable TRIM on third-party SSDs without having to download and install anything. 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. The TRIM function regularly deletes the unused space on SSDs while the CPU/IOs are not too busy. How to enable TRIM on macOS Open the Terminal from /Applications/Utilities. Read the system notice, type y, and press enter. Type the admin password, and press enter. Type the command sudo trimforce enable, and press enter. If you took a Mac that originally came with a spinning disk and installed an aftermarket SSD in it yourself, the operating system wouldn’t use TRIM on the disk-at least, not unless you resorted to third-party tools. This is where the TRIM function of a system comes in play. How to Enable TRIM on macOS in Five Easy Steps To expand the lifespan of your SSD, follow the steps below: Launch Terminal. SSDs are very fast out of the box, but without TRIM, write speeds can gradually decrease over time as the disk becomes slower at overwriting previously used blocks. The lone exception to that list has been Apple’s OS X, which-at least until today-only supported TRIM on its OEM SSDs. Enabling the TRIM command will allow Mac OS X to perform garbage collection on the Solid State Disk (SSD) to optimize write speeds. ![]() Pretty much every operating system in use these days supports TRIM-a special ATA command that the OS sends along to an SSD when deleting files on that SSD. Further Reading Ask Ars: “My SSD does garbage collection, so I don’t need TRIM… right?”
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