Ever since the release of OS X 10.6.8, Apple has been selectively enabling the TRIM command for SSDs in OS X. This support continues on in OS X Mavericks, but as many have noted, it only seems to work for Apple SSDs by default. We’ll show you how you can enable TRIM across the board.
Back Up Your Mac Before Enabling the TRIM Command You need to enable trimming manually when installing a third party SSD. All Macs shipped with an SSD have TRIM enabled, however, and yours can be checked by clicking on the Apple logo About This Mac System Report SATA/SATA Express and look for “Trim Support”. Mac-trim-support-non-apple-ssd.markdown How To: Enable TRIM with Non-Apple SSD The guide breaks the process down into three steps, all performed via copying. Increase Your SSD Life and Performance! Chameleon is an optimization tool for Solid State Drive on Mac OS X system. It can enable TRIM on non Apple-branded disks. The macOS RAID driver does not support TRIM. This is true for all versions of Mac OS X from 10.7 through macOS 10.12.x. TRIM is supported for RAID (0,1,4,5 & 10) volumes when using the third-party SoftRAID® application, including TRIM support with non-Apple SSD devices. (Note: TRIM for non-Apple SSD devices must be specifically enabled using.
What is TRIM?
The TRIM command is an important disk command for SSDs that keeps your flash memory appropriately cycled so that you can achieve faster read and write speeds, as well as a longer lifespan for your SSD. As such, TRIM support is not the trivial matter that some make it out to be (although certain manufacturers, such as Other World Computing, include firmware that eliminates the need for OS-level TRIM support).
How to Enable TRIM Via the OS X Terminal (Recommended)
In you have an SSD that supports TRIM, follow the below instructions to enable it in OS X Mavericks. Note: This involves the use of terminal commands, so proceed at your own risk.
First, enter the command found in this document in the Terminal app on your Mac (found in Applications/Utilities).
Trim Ssd Mac Os Mojave
After entering this command, you’ll need to enter a second command:
sudo touch /System/Library/Extensions/
The above-linked document also contains some troubleshooting instructions, as well as details on how to disable TRIM support if necessary.
Using a Third Party Tool
If you don’t find success using the Terminal command to enable TRIM for your SSD, there are two third-party apps that can help you enable TRIM support. I recommend trying Chameleon SSD Optimizer first. If that doesn’t do the trick, you can try TRIM Enabler 3.0 or later for Mac. I don’t like to recommend third-party tools, as they often make system-level changes above and beyond those performed by the terminal command – and that may not be in your best interest long-term.
Verifying TRIM Support
To ensure that the command was successful, and that TRIM really is enabled on your SSD, click the Finder menu in the Menu bar, then navigate to About This Mac > More Info > System Report. Then, scroll to the SATA/SATA Express section, and select your SSD. You should see a section called TRIM
Note: In some cases, a restart may be required before TRIM shows as Enabled in the System Profiler. With Mavericks, not all SSDs will report TRIM support, but doing a benchmark both before and after the change should confirm that TRIM is functional.
Added Bonus: Thunderbolt TRIM Support!
Samsung Ssd Trim Mac Os X
As an added bonus in OS X Mountain Lion or later, including OS X Mavericks (I have not tested this in previous versions of OS X), raid can now also be enabled for SSDs hooked to your Mac through a Thunderbolt PCIe controller, such as the excellent Magma ExpressBox 3T! For more info on these devices, check out our complete review roundup of Thunderbolt PCIe controllers – perfect for Apple’s 2013 Mac Pro!
If you’re looking for an SSD to use in your Mac, I recommend checking out the OCZ Vector or the Sandisk Extreme. Also, make sure to check out the full range of affordable SSDs available on Amazon!
For more helpful tips, check out our full collection of tutorials by visiting our How-To category!
Did you just buy an SSD for your MAC running Lion and would like to get the best of it?
A short explanation:
In normal hard disks when a file or directory is been erased, in fact the space used by the file or directory is simply put back on the unused space list. Nothing is really been erased at all. That is why sensitive information should always be overwritten by something instead of simply erased… but that is another subject.
So the space that is been made available again will soon or later be used again as we would expect. When it is used again the new data will overwrite the old one. That is where SSDs and rotating hard disks differ. With rotating hard disks, the new data is simply written in the available space without having to erase the old one before. In SSDs the technology demands that the old data be first erased before new data will be written, which slows down the writing time. This means with time the writing speed of SSDs starts to slow down drastically. This is where the TRIM function of a system comes in play. The TRIM function regularly deletes the unused space on SSDs while the CPU/IOs are not too busy. This saves a lot of writing time, therefore keeps the high writing speed of SSDs up to their maximum throughout the life of the SSD.
Well here comes the bad news for MAC Lion owners … and the the good ones afterwards 🙂
Ssd Trim For Mac Os Catalina
The BAD NEWS:
Apple has restricted the TRIM function only to the Apple identified SSDs. Therefore all non-Apple SSDs don’t get the feature. Nasty hunn??
Then click Create Chapter button to open the Create Chapter window.Add Chapter ManuallyMove the slider to the time you want and click Add Chapter to create a new chapter.Auto Create ChapterYou're able to create chapters by trimming the video to equal parts. On the right, switch to the Map panel(next to Burn button), and choose the video or slideshow you want to make chapters from. Iskysoft dvd creator for mac.
The GOOD NEWS:
Some very talented and generous guys have found a way to modify the kernel module of MAC Lion (till 10.7.4 but not on 10.7.5)in order to enable the TRIM function for all SSDs and not only Apple ones. . and here is how it is done:
References:
http://bytelude.de/2011/10/13/ssd-trim-support-unter-mac-osx-lion-aktivieren/
http://digitaldj.net/2011/07/21/trim-enabler-for-lion/
INSTRUCTIONS:
Make a copy of the original kernel module:sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original
Modify the kernel module:sudo perl -pi -e 's|(x52x6Fx74x61x74x69x6Fx6Ex61x6Cx00{1,20})[^x00]{9}(x00{1,20}x51)|$1x00x00x00x00x00x00x00x00x00$2|sg' /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage
Do some system preparationsudo kextcache -system-prelinked-kernel
sudo kextcache -system-caches
Reboot the system . and cross your fingers 😉
Check the the activation of the TRIM feature:
– Open up ‘About This Mac’
– Click the “More Info…” button and then the “System Report” button.
– In the list on the left, choose “Serial-ATA”.
– Click on your SSD Drive and in the lower half of the screen you should now see “TRIM Support: Yes” instead of “No”.
If something terribly goes wrong then restore the backup:sudo cp /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage.original /System/Library/Extensions/IOAHCIFamily.kext/Contents/PlugIns/IOAHCIBlockStorage.kext/Contents/MacOS/IOAHCIBlockStorage
sudo kextcache -system-prelinked-kernel
sudo kextcache -system-caches
sudo reboot
NOTE 1:
I have installed a 512 GB Samsung Series 830 on my MAC Book Pro i7, followed these instructions and all worked without a glitch. I’m very thankful to the people who have worked to discover this modification and made it available to us.
With this app in place, you can just download and watch what you want, without having to worry about formats, compatibility, and conversions. And since it's free, there's no reason not to try it out to see if it will work for you. 
VLC Media Player for Mac is a powerful and efficient app for playing all kinds of media in multiple formats right on your Mac.
Note 2 (30.09.2012):
I just updated my OS X from 10.7.4 to 10.7.5, especially because of WiFi instability, and found my TRIM support going from ‘Yes’ to ‘No’.
Well, that was rather expected, but the unexpected thing was that the above method with the terminal commands this time didn’t work.
I found in Internet an application that does the trick though even in 10.7.5. Easy to use and you need to reboot afterwards.
It’s called App Trim Enabler found at: http://www.macupdate.com/app/mac/37852/trim-enabler
Note 3 (20.06.2013:
Just got the news of another TRIM tool called Cameleon SSD Optimizer. I haven’t tried it yet but seems promising. You can get it at:
http://chameleon.alessandroboschini.it/index.php
Happy ‘Trimming’