I can vouch for these
instructions used on 10.8.2 with a Samsung 830 SSD.
This modifies an existing .kext file on the system, to remove the APPLE SSD restriction for TRIM support. It doesn't replace the file.
I have no personal experience with "TRIM Enabler" software, but what I've read is that it replaces an existing kext with one of a different version. If that's true, this is definitely not a good practice. Kernel extensions of this sort are frequently kernel specific.
If your SSD is less than 70% full, it's likely that the firmware dynamic wear leveling is able to do sufficient garbage collection to avoid performance issues, and that's been the case with my Samsung SSD. But as it fills, or pages become fragmented, TRIM is the best way to inform the SSD that those pages can be garbage collected, whereas otherwise the only way the SSD can know this is if those pages are written to (it actually redirects the write to a different page ready for writing, while flagging the original page as being ready for erase).
So really, Apple is not being a good citizen here. This is sorta like the old days where they gave users a hard time about using 3rd party hard drives, instead of spending 2-3x on an Apple branded drive. So in a way, the more things change, the more they stay the same with Apple.
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So really, Apple is not being a good citizen here.
Just to put a fine point on this, Microsoft has a significantly larger percent of the market. Their users come across all sorts of weird junk that may not work exactly right. Yet Windows 7 supports the ATA TRIM command on any SSD that reports support for TRIM.
So, the world's
most advanced desktop operating system, at about 6 months old, does not have a basic feature that 3 year old Windows 7 has, and is part of the ATA specification.
