Rather than use 3rd party utilities, I manually enabled Trim on my Mac Mini's Intel 520 SSD running OS X 10.9.3. ( FYI: OS X 10.10.4 has a 'Trimforce' option for non-apple SSDs. Manually Enabling TRIM in OS X from terminal/command line: My first thought was creating a small sleepimage file and write protecting it, but curious if anyone has a better suggestion. Checking /private/var/vm/ showed the sleepimage file was back (w/new timestamp). (System/drives were set to never sleep, only the LCD display but I tested again with display set to never sleep - deleted the file, let the mini sit idle for 5 minutes or so (no wifi or internet connection active, only the terminal open). In fact, I noticed it recreated again after only several minutes of idle time.
Deleting it (via sudo, file located in /private/var/vm/, or /var/vm/), ls check shows file is gone, verifying (via pmset) that hibernate is disabled yet the sleepimage file reappeared on the next boot/restart - even if the mac had not been in sleep at all. Regardless of hibernate mode being disabled and deleting the sleepimage file, it will later reappear. Just noticed this recently on a 2012 Mini w/OS X Mtn Lion, but hadn't checked earlier for the sleepimage file 'reappearing' after deleting it. I enabled Trim manually on my Intel 520 SSD in OS X 10.9.3.) (Original request asked about Sandforce SSD use, but any are welcome. manually ( July 2009 archives) and (later) linked to an earlier Trim Enabler (only) utility at, but Chameleon also includes other features we used to do via terminal.) There's also a report here from an Intel 520 (SF) owner using the earlier () Trim-Enabler. (Older pages here years ago had terminal commands to enable Trim ( March 2011 archives), disable hibernate mode, delete sleepimage file, disable SMS, etc. This page is a catchall of reader feedback from a request for feedback (esp for Sandforce SSD users) in the May 3rd news page on Chameleon SSD Optimizer Utility to enable TRIM on non-Apple ID SSDs and more. 2015 ( Notes on OS X 10.10.4/Disk Sensei/Trimforce) (Or enable OS X TRIM via command line without 3rd party apps) Mac user reports on Chameleon SSD Optimizer, OS X Trim Enabler, & Disk Sensei Recent Updates | Mac Upgrades/Repairs | Storage | Video | Audio/HT | Apps/OS/Network | Home Enabling SSD TRIM in OS X using, Trimforce, Chameleon SSD Optimizer, OS X Trim Enabler, Disk Sensi or Manually
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