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Finally Enabled TRIM (manually) in OS X 10.9.3 on Mac Mini (Intel 520 SSD)
I finally decided to enable TRIM on the SSD in the late 2012 Mac mini manually using commands in the Terminal. [Now updated for 10.9.4.] The mini isn't a work machine but so far no issues seen with the 480GB Sandforce-based Intel 520 SSD with TRIM enabled in OS X 10.9.3, but again it's not used very much. Will post an update if I see any problems down the road.

FYI: OS X 10.9.4 Update Breaks Previous SSD TRIM Mod (OS X 10.9.4 released June 30th.)
After updating to OS X 10.9.4 via software update, I checked system Info and it showed TRIM support as "No". I usually prefer a download updater but was hoping that Software Update (a delta) would not overwrite the file (and undo the mod). Get Info on the file from 10.9.4 shows the version and date wasn't newer, but apparently my (modified) file in 10.9.3 was replaced during the update.
   I then tried enabling TRIM again in OS X 10.9.4 using the same commands as before (via terminal) and restarted. TRIM was still not shown as supported. After 2 tries using the command line without success, I restored the IOAHCIFamily.kext file from a TM back I'd made after the mod in OS X 10.9.3. A restart and check showed TRIM support was back. (Normally I don't like to use files from a previous update but the mini isn't used for anything important anyway.)

Despite the file date/time/version being the same, 10.9.4 Software Update overwrote the existing file and the pkg was revised for 10.9.4 as TRIM mod commands had to be changed for replacing the SSD ID string.

Update: I later reinstalled OS X 10.9.4 from a D/L updater and used the new terminal commands for 10.9.4 to enable TRIM again. (Info on 10.9.4 added previous post on terminal commands.) After a reboot TRIM was again shown as "Yes" in OS X 10.9.4 System Info SATA listing for the Intel 520 SSD.

Apple/Mac/iOS related News/Tips/PR: (very light today)
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Here's a page of Tips, Troubleshooting & How-To Guides for Mac/OS X/iOS Users.

Recent Articles/Tips/Tweaks/Reviews:
Listing/links of Updates, DIY mod/upgrade articles, Tips and more you may have missed.

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Previous News Archive Summary:
    Wednesday June 25th, 2014 News
  • Review of Acronis True Image for Mac
  • Marvel Heroes 2015 Now Available on Mac
  • MS Mac Office 2011 v14.4.3 Update (Info/download)
  • OWC Radio: Harry McCracken Talks New iMac, Old Tech
  • How to Use AirPlay Mirroring (with iPad or iPhone and Apple TV)
  • Tutorial: Create a Photographic Story in Lightroom with Photo Books

For links to older news pages, see the Archives.

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