Then The SSD TRIM command tells the drive that the data can be erased. When you delete a document on your SSD, the area of the SSD that contains the deleting data is marked as no longer used. Usually, the SSD TRIM command works with Active Garbage Collection to clean up and organize your solid-state drive. For example, SCSI provides the UNMAP command - A full analog of TRIM. SSDs with other different interfaces also have a similar command like TRIM. In addition to the ATA interface, TRIM is also available for SSDs that support the SATA interface. SSD TRIM, known as an Advanced Technology Attachment (ATA) command, tells an SSD which data blocks it can erase with the help of the operating system since they are no longer in use. Keep reading to find the answer to your doubts about SSD TRIM and this post also tells you how to enable SSD TRIM on Mac. If you have been noticing your drive feeling particularly slow these days, you might want to give this a try to see if it helps.If you are using an SSD or you want to buy a new SSD, you should know what SSD TRIM is and why it matters for SSDs. Some recommended you reboot into safe mode after enabling TRIM support, and running a drive health check, as that supposedly honors TRIM support and tells the drive to start doing its thing for previously deleted files right away. Reply with y to the question, and hit enter.Īfter your computer has rebooted you can confirm TRIM support is fully enabled by checking System Report again. Make sure you are ready for your machine to immediately want to reboot after this command. To enable trim support, simply open up a Terminal, and type in the following command. But I have not tested this, so please do let me know if this is even possible if that's something you end up trying.

From what I can tell you cannot pick and choose which drives you want to enable support for, though you might be able to achieve that if you desire by temporarily unplugging whichever SSD you don't want to enable TRIM support for before running the command. Once run, this will enable TRIM support on all SSD drives installed. Enable TRIM supportĮnabling TRIM support is just one single command. It simply refers to whether or not macOS currently has TRIM support enabled for this particular drive. Note that in this context, 'support' does not mean whether or not your drive actually supports it. Select your SSD and look through its details until you find TRIM Support. To check what the current status is of TRIM support, head on over to System Report (Apple menu » About This Mac » System Report.) and head for the SATA/SATA Express or NVMExpress section, depending on what kind of drive you have installed.

While it can be ok to be a bit brave, if an SSD is known to not support TRIM support (or not well), it's probably best to avoid enabling it. And, so long as you keep a proper backup, in the worst case scenario of your particular SSD not supporting TRIM properly, you can revert back easily.ĭo note though, that it will be good for you to check online first to see if anyone else has used the SSD you have with TRIM enabled. My guess is that if you're running a Hackintosh, you're probably used to dealing with scary sounding messages. Fortunately though, enabling TRIM support is easy enough, so long as you're ok saying yes to a scary sounding message. This is done because not all manufacturers follow the standards, and often just test for compatibility with Windows. As you may or may not know, TRIM support is not enabled by default on macOS on any SSD not provided by Apple directly.

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