Mac + Samsung SSD = TRIM?

I wouldn't count on just disabling trim - if I were you, I would just install Yosemite anew and override any damage that may have been caused by a trim enabler application.

Just what I did...

Clinton

MacBook Pro (15” Late 2011), OS X Yosemite 10.10, 16GB Crucial RAM, 960GB M500 Crucial SSD, 27” Apple Thunderbolt Display

Stema,

I just did the new installation for my peace of mind. It's my understanding that once the secure kext scheme has been fiddled with, there's no going back except with a reinstallation. It only took about 30 minutes and I'm much more comfortable with having a 'secure' system rather than one that has been modified.

Others may know of a way to 'revert' to the secure kext scheme without reinstalling Yosemite. As I said, I just did it to feel 'safe.'

Clinton

MacBook Pro (15” Late 2011), OS X Yosemite 10.10, 16GB Crucial RAM, 960GB M500 Crucial SSD, 27” Apple Thunderbolt Display

I had a copy of the "Install OS X Yosemite.app" that I had copied to a hard drive before I installed it (because it always disappears from the boot drive after installation). So I didn't need to download it again (although the download only took about 18 minutes, so it would have been no big deal to redownload).

I copied the file to the Applications folder on my boot drive and, from beginning to end, the installation process only took about 30 minutes. Just to make certain that I was 'back' to the protected kext scheme, I ran Trim Enabler again and got the message about having to alter the kext scheme - and then quit Trim Enabler.

I feel much safer now - I'm not big on system hacks, anyway, even though I've been using Trim Enabler for years. Now I'm back where Apple wants me to be - no trim, but no security holes, either.

Clinton

MacBook Pro (15” Late 2011), OS X Yosemite 10.10, 16GB Crucial RAM, 960GB M500 Crucial SSD, 27” Apple Thunderbolt Display

Yes - although it is ALWAYS, ALWAYS best to have a backup before installing the OS again. However, the chances of anything going wrong are slim.

Good luck,

Clinton

MacBook Pro (15” Late 2011), OS X Yosemite 10.10, 16GB Crucial RAM, 960GB M500 Crucial SSD, 27” Apple Thunderbolt Display

Hi all!

This conversation has been very useful! Thank you all for sharing your thoughts about Trim/SSD/Mavericks/Yosemite. Never did quite like the way TRIM enabler worked on Yosemite. Glad to know I am not the only one!

I also read that TRIM would make any SSD last longer. If that is correct, I assume an SSD without TRIM enabled will have a shorter life.

Having that in mind I will not purchase the larger (250GB) Samsung SSD I intended, instead I'll buy a lower capacity one (120GB) and spare the money for another one in the near future (say two years) as soon as the first one fails. Hopefully by than SSDs prices will have dropped and the TRIM-Gate (only joking) might offer different approaches in other to solve it.

I wonder if what wrote makes any sense! What do you think? ;D

-Fulvio

Just upgraded to Yosemite on Macbook Pro but I have a Samsung SSD .The trim enabler software for the SSD will no longer work unless I grant permission to turn off KEXT signing. Regrettably it seems KEXT signing option is an all or nothing deal; no way to disable KEXT signing just for my SSD. I don't know an alternative since I assume I need to have trim working - or my SSD will go bad, so I said "yes" to disable KEXT My fear is the lockout that I will see if Trim is on and for some reason kext signing gets turned back on. Why can't Apple run a test before I upgrade and tell me what might get messed up before I pull the trigger. Or why not make it easy to go back to 10.9.5. Thoughts on what I can or should do?

If I want security and a properly working SSD is the only answer to throw out my Samsung SSD that I paid about $500 for a little over a year ago and purchase a SSD through Apple?

Peter,

When the GM of Yosemite was released, I started Trim Enabler (as I always do after an update) and took the steps to enable trim. I got the disable kext message, went ahead and did it and then enabled trim. I though about it for about 10 minutes and resonated the GM of Yosemite to re-enable the kext signing scheme. Why? Because I was worried that it might be a security risk AND that I may have opened a hole for future Apple updates to fall into.

So if I were you, I would reinstall Yosemite (takes less than 30 minutes) and disable trim/re-enable kext signing and just wait until there is some scheme to enable trim without having to disable the kext security measure.

Good luck,

Clinton

MacBook Pro (15” Late 2011), OS X Yosemite 10.10, 16GB Crucial RAM, 960GB M500 Crucial SSD, 27” Apple Thunderbolt Display

Peter DiSalvo wrote:

If I want security and a properly working SSD is the only answer to throw out my Samsung SSD that I paid about $500 for a little over a year ago and purchase a SSD through Apple?

I'm not sure even that is a solution, since Apple only seems to provide TRIM type of support for solid state storage that is installed in a Mac at time of purchase. These are generally non-replaceable flash storage, so if you have a Mac that did not originally have an SSD, Apple is not going to have a post-purchase SSD upgrade available for your Mac. If you want both a secure kernel and TRIM support for a third-party SSD, the only current solution is to stay on 10.9.

I am in the same boat, paid almost $500 for an SSD that I love. For now, my MacBook Pro with its SSD and Trim Enabler are staying on Mavericks.

Does anyone know about the consequences of using an SSD without any sort of Trim? How long before my SSD is useless? I need to be careful about how I word this I have already been shut down for even implying that I am unhappy that there is not some sort of checking for compatibility before allowing me to proceed with upgrade. After all it was the OEM hard drive that failed and why I upgraded to an SSD. Remember can't say anything bad, it will not appear on these boards.