Trim Enabler 3.3 is out, with improved compatibility with OS X Yosemite.
Does Trim Enabler work in OS X Yosemite?
The answer is Yes, but due to new security features in Yosemite, enabling Trim can cause problems with your OS X installation.
Make sure to read this document about Trim Enabler and Yosemite before enabling Trim on Yosemite:
October 17, 2014