Trim For Mac Os Yosemite

Posted By admin  On 23.04.21




The state of Trim in Yosemite

Enable SSD TRIM on Mac OS X Yosemite I. FAQ and support for using Trim Enabler in OS X Yosemite; Github gist: trimenabler.sh; Life Hacker: How to Enable TRIM on Your Mac's Solid-State Drive; Email This BlogThis! Share to Twitter Share to Facebook Share to Pinterest. The #1 SSD performance utility for Mac. Enable Trim, monitor your disk health, optimize your performance, and benchmark your drive with the new Trim Enabler 4. 10.11 El Capitan. 10.13 High Sierra. TRIM Enabler for OS X Yosemite 10.10.3. GitHub Gist: instantly share code, notes, and snippets. The Yosemite installation installs a signed kext, and Trim Enabler gets the TRIM status of the SSD from the OS, which won’t turn it on from non-Apple SSDs. After installing Yosemite, Trim Enabler can be used to turn TRIM on, providing one is willing to turn kernel extension signing off, of course. Reader Richard Spitzer is concerned about using a third-party SSD drive with his Mac running Yosemite. He writes: I just read an article that Apple is disabling the TRIM function for third-party.

As some users may have noticed, if you try to enable Trim on OS X Yosemite, you can get stuck with a grey screen with a stop sign during boot. And as detailed in these two posts., this issue was due to a new feature in OS X Yosemite.

In OS X 10.10 (Yosemite), Apple has introduced a new security requirement called kext signing. (A kext is a kernel extension, or a driver, in Mac OS X)

Kext signing basically works by checking if all the drivers in the system are unaltered by a third party, or approved by Apple. If they have been modified, Yosemite will no longer load the driver. This is a step by Apple to lock out anyone from making software that interacts with the system, to make the Mac experience more and more similar to iOS. Best free apps for mac pro.

Since Trim Enabler works by unlocking the Trim driver for 3rd party SSD’s, kext signing prevents Trim Enabler to enable Trim on Yosemite, at least out of the box.

Currently, there is only one way to continue to use Trim Enabler and continue to get Trim for your third party SSD, and that is to disable the kext signing requirement.

While it is unfortunate to have to disable kext signing, it still leaves you with the same amount of security as in OS X Mavericks, where the kext signing requirement didn’t exist.

Trim Enabler 3.2.5 Update

I have released a Trim Enabler 3.2.5 update, which is adapted for Yosemite:

Yosemite Mac Os Dmg

  • Trim Enabler can now disable kext signing in order to enable Trim on Yosemite
  • Fixed an issue with Trim Enabler not launching on Yosemite DP4 / Beta

Apple is locking down the Mac

Installer

It’s becoming clear that Apple wants to block applications from altering the OS X experience. While disabling kext-signing still allows Trim Enabler to work, I wish the process of enabling Trim would be smoother. The first thing that comes to mind is to create a kernel extension that somehow achieves this purpose. But as detailed here:

“Kext signing means that a valid, signed kernel extension can only be created with a certificate provided by Apple as part of their $99/yr Developer program, and additionally that interested parties must fill out a special form explaining why they require the certificate; kext certificates are only provided upon request and approval.“

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Apple now effectively controls which kexts are allowed on OS X, and thus, what features that developers like me can release for OS X. And since Apple has made such an effort to block third party SSD’s from getting Trim support in OS X, my guess is that if someone were to make such a kext, Apple would deny a certificate, making it impossible to distribute. So for now, using Trim Enabler 3.2.5 and later is the best way to enable Trim on OS X.

Mac Os X Yosemite Installer

I believe that Apple’s new direction for OS X is unfortunate and ultimately will end up greatly limiting Pro users in favor of usability for casual users. I don’t think it’s long before we will have to start “jailbreaking” our Macs as well.

Recovering from stop sign on boot screen

For those who are stuck on the grey boot screen, here’s how you get back into OS X:


If you want to discuss Trim Enabler and Yosemite, use the sticky topic on the forum: Trim Enabler in Yosemite

Some SSD drives are crashing in Yosemite do to an issue with something called ‘TRIM’. Thankfully if you followed the method in my article entitled “How to speed up your mac with a Solid State SSD Drive” you will not have this problem. But if you have used an SSD that needs TRIM, read on to find out about the problem and how to fix it.

What is TRIM?

Trim is a command your computer gives to your SSD hard disk to tell it to delete a very small amount of data.

If you think of data as papers in a filing cabinet, to remove an empty page (if you were an old hard drive) you would need to take out an entire folder of papers, then find and remove one page, and then put back the entire folder. This is because spinning hard disks deal with huge chunks of data called blocks, which are like a folder, and they can’t deal with anything smaller than a block of data. They spin so fast and the blocks are so big that doing an entire folder at a time is the fastest way to do it.

With an SSD drive they are different and so it’s much faster to do it 1 page at a time. In fact it’s slow to deal with writing large chunks of data. TRIM is a command that allows an SSD drive to remove (delete) 1 page at a time instead of a whole folder at a time.

TRIM and no TRIM SSD’s

In order for TRIM to work the SSD must have ‘TRIM’ support, and the computer must have ‘TRIM’ support.

Trim for mac os yosemite high sierra

Some SDD’s are enabled to work with TRIM. Others have chosen to deal with deleting data in a different way. They have their own ‘filing’ system. So the computer says ‘delete this page’ and the SSD does it automatically. It’s a bit like having your own personal secretary to do your filing. For those SSD’s it’s actually better to keep TRIM turned off and leaving it all to the secretary, so to speak.

For example this is what OWC say about TRIM:

If you have an OWC SSD, though, you don’t need TRIM. Download traktor s4 for mac. The SandForce controller in our SSDs takes care of this “garbage collection”… In fact, enabling TRIM could actually hurt the performance and reliability of your OWC SSD, rather than help it.

Apple and TRIM

Apple have not allowed TRIM support unless you have an Apple installed SSD Drive. That means if you want to install your own SSD into a mac, you have 2 options.

(1) Install an SSD that doesn’t need TRIM.

Trim For Mac Os Yosemite Dmg

Here are some SSD’s that work better without TRIM:

– any SSD with a Sandforce controller.

– All OWC Mercury Drives. (read this)

– Crucial M4

– Samsung 840

(2) Use an SSD that needs TRIM but run a hack that turns on trim support in OS X.

Here are 2 such hacks:

http://www.cindori.org/software/

http://chameleon.alessandroboschini.com

Disaster in Yosemite!

Many people chose option 2, to use an SSD with TRIM and run the hack, but in Yosemite all TRIM enablers/hacks were disabled by Apple. Anyone who did this now found their SSD would not boot in Yosemite. Nasty move by Apple. This was a disaster! (Thankfully, in my SSD article I recommended to use drives that did not need a TRIM enabler.)

The Fix

#1 PREVENTION is the best cure: use a drive that doesn’t need TRIM.

Trim For Mac Os Yosemite 10.13

#2 If you have a TRIM drive already, and use the TRIM hack, the writers of the TRIM enablers are trying to get around this.

#3 If you don’t yet have Yosemite, grab a non-TRIM SSD and copy your data across to it before you upgrade to Yosemite.

Yosemite Os Mac

#4 if you have already upgraded to Yosemite and are now getting a grey screen, go to this article and scroll down to the section called “Recovering from stop sign on boot screen.” It has some steps to help.