Thanks to Jason Nash’s article I managed to finally get TRIM enabled for my SSD on my MAC. The procedure works great, however when you have a dual SSD setup like I have (booting on a 120GB Intel and running my VMs on a 256GB Kingston) it doesn’t work as replacing the identifier leaves you with 1 SSD without TRIM support. I googled around for a bit and found this article by Oskar Groth. Oskar made a nice GUI tool that enables TRIM for you on all SSDs that your Mac contains! Be aware that this is a hack and there is no support whatsoever for this. So why would you add it? Well look at the test that Jason did, and I also did some testing and the preliminary findings are that it vastly improves your performance!
Per-Erik Broz says
XBench reports lower performance on my MacBookPro5.3 with a C300 256GB. Scored 342 before and now the highest I manage is about 250. System Profiler reports disk type SSD and TRIM support.
Fletch says
My non-hacked XBench numbers were higher than the author’s HACKED (TRIM) numbers. Maybe there was a reason Apple has not yet integrated TRIM?
Many users reporting its slower – will wait for Apple to support TRIM (or not 😉
Looking to revitalize an Acer Ferrari 5000 with a failing HD – can anyone recommend a DIY SSD for this?
thanks
solgae says
This is why you don’t want to blindly enable something on an environment different than what most review sites run their test on. Some SSDs have garbage collection that does essentially the same thing as TRIM, but in a firmware level, so there’s no need for TRIM support in the OS. SSD drives that uses Toshiba controllers have garbage collection as an example, and recent Macbook Air models employ SSDs that does exactly that, so there’s no performance loss over time. I believe Crucial RealSSD C300 and Kingston SSDNow v100 does this as well. TRIM is only enabled on Apple-provided SSDs on 2011 Macbook Pros, which runs a special build of Mac OS X.