Pram wrote:
Christopher Breen has an article today in Macworld explaining that most SSDs will not work with Yosemite.
That's not what it says. SSDs will work with Yosemite, the only thing that won't work is enabling third-party TRIM support. The SSD will boot and the SSD will work and it will be fast; having TRIM enabled is not even remotely a requirement. TRIM is just a housekeeping routine that is generally thought to be desired, but there's even debate on that.
The part of the Macworld article about not booting should only happen if you 1) enabled TRIM, 2) disabled kext signing, and 3) reset NVRAM, which re-enables kext signing and therefore blocks access to the hard drive you need to boot from. But if you didn't do 1-3 your Mac will boot into Yosemite just fine.
Some SSD brands do not require TRIM and some like OWC don't even recommend it because their SSDs have their own similar routines. I have a Samsung 840 and it works fine in Yosemite but I have not attempted to enable TRIM. I am not sure what the long term impact of that is, and I'm going to post a separate question regarding whether Disk Utility performs a trim when you Repair Disk because I read that somewhere.
In the end, the questions are: Does my SSD need TRIM, and if it does, how bad is it to run it in Yosemite without TRIM enabled? I am trying to find out the answer to the second question to know if not enabling TRIM is going to cause any more than minor problems down the road.
