Apple’s latest OS X 10.10.4 update, which rolled out alongside iOS 8.4 on Tuesday, finally brings TRIM support for third-party solid-state drives (SSDs). Users must enable it manually, but it’s a fairly simple process that takes just a minute.
TRIM makes SSDs more efficient by closely monitoring the unused blocks and informing OS X which ones can be erased and written to. Without it, SSDs become slower as they fill up, but this has only really been an issue on OS X.
Most other modern operating systems support TRIM on all SSDs, but until now, TRIM has only been available in OS X on Apple’s own drives. Now you can enable it for third-party devices as well.
“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,” Ars Technica explains. “Called trimforce, the utility can be executed from the OS X terminal, and it requires a reboot to start working.”
Here’s how to get TRIM working with third-party SSDs: Open up the Terminal and type “sudo trimforce enable” (without the quotation marks) and hit return. OS X will warn you that enabling TRIM may result in “unintended data loss or data corruption” — so you may wish to backup your drive first — but once you’re ready, you can type “y” and hit return to confirm the process.
Your Mac will reboot once the process is compete, and when it starts back up, TRIM will be enabled on third-party SSD drives.