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With OS X 10.6 I had massive problems with an SSD – it became slower and slower with each day. At the end I replaced it with a classical hard disk and it was quite fast again.

Now I want to know if at least OS X 10.7 supports TRIM to prevent SSD performance decreasing over time?

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Everything I've seen shows Lion supporting TRIM for Apple SSDs, but I have yet to see any screenshot or other evidence showing TRIM enabled on a non-Apple supplied SSD. I would LOVE to see one since I'm hoping to buy an SSD to give new life to my macbook pro. – digitaljoel Jul 20 '11 at 17:34
I believe it's only Intel SSDs but don't quote me on that – Sandeep Bansal Jul 20 '11 at 17:57
BTW, I was using a Super Talent Masterdrive SX, which is working fine now on Windows 7 (which has TRIM support). – Mike L. Jul 21 '11 at 19:07
up vote 3 down vote accepted

From what I've seen, official TRIM support is limited to Apple-supplied SSDs, but Trim Enabler still works. (Reference Discussion)

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No TRIM for me on an Apple SSD after upgrading:… – edoloughlin Aug 3 '11 at 15:40
Perhaps they didn't go back and add TRIM support for all SSDs that didn't already have it. Actually, this is probably the case. Apple's never exactly been known for continued hardware support. – afrazier Aug 3 '11 at 17:10

Hmm, OS X Lion says no TRIM support for my OCZ Vertex2.

Thankfully this SSD controller has good garbage collection routines. Didn't notice a slowdown on OS X Snow Leopard (10.6), so I'm not too worried.

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Thank you Martijn, this is exactly the kind of evidence I was looking for. Unfortunate and silly, but useful. – digitaljoel Jul 20 '11 at 19:15

Hi yes Lion does support TRIM, if you look at the link below you can see a post with evidence.

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