Apple adds SSD TRIM support to Mac OS X 10.7 Lion beta

It's disappointing that this has been lacking, it's a very important feature for proper use of modern SSDs and it's been in Windows since late 2009 and Linux since early 2010.

It's unfortunately NOT supported for everyone.<p><a href="http://neosmart.net/blog/2011/os-x-10-7-lion-adds-trim-support-but-not-for-all/" rel="nofollow">http://neosmart.net/blog/2011/os-x-10-7-lion-adds-trim-suppo...</a><p>That's on a top-of-the-line C300 256GB. It's detected as an SSD, but no TRIM support though the drive itself does have TRIM.

danudey left a helpful link to a comment I made recently about TRIM support in Lion. Apparently, 10.6 is doing some good SSD maintenance even without TRIM support, and SSDs do not experience the same performance drops as they would on a Windows machine without TRIM support, but it is not clear why this is the case.<p><a href="http://www.bit-tech.net/hardware/apple/2010/07/01/mac-ssd-performance-trim-in-osx/7" rel="nofollow">http://www.bit-tech.net/hardware/apple/2010/07/01/mac-ssd-pe...</a>

As I said in the other thread, displaying the fact that an SSD supports TRIM does not prove that HFS+ uses TRIM, but it's a good sign.

To someone who bought a 2010 MBA in October and doesn't get an OS that supports TRIM until this summer, what's going to be the impact on the useful life of the SSD?

interesting discussion of TRIM here: <a href="http://www.realworldtech.com/forums/index.cfm?action=detail&#38;id=116082&#38;threadid=115697&#38;roomid=2" rel="nofollow">http://www.realworldtech.com/forums/index.cfm?action=detail&...</a><p>(read the thread segments which relate to TRIM)

Bend over and get screwed by Apple. At every OS update.