Preview at WWDC likely in June, followed by September launch.
First Third-Party SSD With Native OS X TRIM Support Launched by Angelbird
Without TRIM, writes to the drive can see significant slowdowns as the system must read and erase each block on the fly before writing new data. But unfortunately for users looking to install third-party SSDs into their machines, Apple only officially supports TRIM on Apple-branded SSDs. Workarounds such as Trim Enabler have naturally been developed to enable TRIM on non-Apple SSDs, but a new lineup of SSDs released earlier this month by Austrian firm Angelbird claims to be the first third-party SSD to support TRIM right out of the box with no need for additional software tweaking.
Exactly how Angelbird has achieved native TRIM support on Mac is unclear, as the company has not responded to requests for comment. French site MacBidouille reports [Google Translate], however, that Angelbird's SSDs appear to simply be masquerading as genuine Apple SSDs, thereby qualifying for native TRIM support. While the method appears rather questionable and likely to draw Apple's attention, the drive could still be an appealing option for users looking for the easiest possible solution for upgrading to an SSD.
OS X Yosemite has added yet another wrinkle for third-party SSD users, as the new kext signing security measure included in the new operating system means that Yosemite systems will refuse to load modified drivers such as those used by TRIM-enabling software. Cindori, the company behind Trim Enabler, is for now recommending that users interested in enabling TRIM on third-party SSDs with Yosemite disable the kext-signing check entirely. The company acknowledges that turning off this global setting is far from ideal and "for most users it will not be worth it", but for now it is the only solution.
Angelbird has not specified whether its SSDs bypass the Yosemite TRIM issues, but if the drives do indeed simply qualify as Apple SSDs due to the way the model number is presented, it is possible that native TRIM support may still function under Yosemite. Angelbird's SSD wrk lineup is available in three capacities: 128 GB, 256 GB, and 512 GB starting at an MSRP of $99.99.