“We started off this article making it intentionally limited in scope as we weren't expecting, in a OS that doesn't support TRIM, to find anything all that inte

“We started off this article making it intentionally limited in scope as we weren't expecting, in a OS that doesn't support TRIM, to find anything all that interesting. What we found was the exact opposite: an OS that doesn't appear to be affected by SSD performance degradation, at least if you stick to the SSD Apple provides - but if you do stick with that SSD, you get, by modern PC standards, decidedly substandard performance. This one raises many more questions than it answers, and we're going to investigate further.” — http://www.bit-tech.net/hardware/apple/2010/07/01/mac-ssd-performance-trim-in-osx/7 http://www.bit-tech.net/hardware/apple/2010/07/01/mac-ssd-pe... TRIM itself doesn’t seem to be an issue. For whatever mysterious reason. (Or their methodology is in some way flawed.) Edit: Since we really shouldn’t be looking at the old MacBook Airs but at the most recent models, this review by Anandtech is certainly also helpful: http://www.anandtech.com/show/3991/apples-2010-macbook-air-11-13inch-reviewed/4 http://www.anandtech.com/show/3991/apples-2010-macbook-air-1... No more substandard SSD performance, TRIM doesn’t seem to be an issue. The author suspects that Apple’s custom firmware is to blame.