Mac OS X 10.6.8 Adds TRIM Support for SSD Drives

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Apple has apparently slipped in support for TRIM for Macs with SSD drives in the Mac OS X 10.6.8 update that was released earlier in June. MacRumors reported the find, which was unannounced by Apple.

TRIM is a feature in solid state drives to handle some garbage collection duties that keep the drive performing better. More specifically, TRIM allows the operating system to inform its SSD which blocks were no longer needed and can therefore be erased by the drive itself, keeping everything tidy in its little solid state brain.

TRIM had been enabled in the MacBook Pros that shipped in February through a version of Mac OS X 10.6.6 specific to those models. It has also been working in developer builds of OS X 10.7 Lion for some time, but as noted above, Apple had not announced that it would enable to feature in Snow Leopard.

The image below was posted by a MacRumors reader showing where TRIM was enabled.

TRIM Support in Mac OS X 10.6.8

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In case anyone is wondering, TRIM support does not seem to be enabled for third-party SSDs in 10.6.8, at least not for the OCZ Vertex2 drive I have, which can accept TRIM commands.

  Capacity:  240.06 GB (240,057,409,536 bytes)
  Model:  OCZ-VERTEX2                  
  Revision:  1.29  
  TRIM Support:  No


Confirm TRIM support enabled on my i7 MBP (factory installed SSD).

TRIM support does not seem to be enabled for third-party SSDs in 10.6.8

noworryz: Will follow-up on a third-party SSD (internal) to my older MBP, but am currently on the road.

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