TRIM is a technology that allows to improve the reading/writing speed on the SSD. The SSD Hard Drive on Macs 2014 and later supports TRIM for better SSD performance. However, By default, the system does not enable this feature, we need to use external applications or command through Terminal to activate TRIM in Mac OS X Mavericks, Yosemite and El Capitan.
There are 2 ways to Enable and Activate TRIM in Mac OS X
Enable TRIM on Mac using Software
There should be a serval software for this task. We would suggest the most common one: Trim Enabler
Trim Enabler increases not only data Writing speed, but also lifetime of the SSD itself.
Activate TRIM in OS X through Terminal
Launch Terminal (Found in /Applications/Utilities/), then copy and paste the following command and Enter.
sudo trimforce enable
How to check if TRIM is enabled in OS X already?
You can check whether or not TRIM is activated on your Macbook, Macbook pro, Macbook air or iMac by following this map: Go to About this Mac> System Report>SATA/SATA EXPRESS.