I currently have an Early-2011 MBP 13" -- 16GB Ram with 512 GB Samsung 840 PRO SSD in place of my original HDD. I heard some issue with TRIM enabler not working unless kext security is disabled. Do i really need trim enabler? I really want to update to Yosemite but still on Mavericks because of this issue. I was also planning on replacing my optical drive with another SSD for more space and whatnot but i don't want to exacerbate my TRIM situation with another SSD. Any advice? I did read this: http://www.cindori.org/trim-enabler-and-yosemite/ But i am not savvy with all the technical jargon. I'm not sure what Kext signing really does and the repercussions of it if i decide to turn it off. It mentions in the article in bold that "It is important to note that disabling the kext-signing to enable Trim is best described as taking a sledgehammer to crack a nut, and for most users it will not be worth it." Why will it not be worth it? I was planning on turning trim off, updating to Yosemite, then turning trim back on (trim enabler 3.3 disables kext signing). Thanks in advance.