Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
OS X El Capitan Opens Door to TRIM Support on Third-Party SSDs for Improved Performance
- Thread starter MacRumors
- Start date
- Sort by reaction score
Yay, I don't have to boot with option held down to leave the Mac sat at the choose boot method screen over night for the SSD to be idle but powered so it can run it's garbage collection 
but at last we have external ssd's esp. thunderbolt II ssd's and these devices benefit from TRIM
this move is a little bit late -- better late than never
But note that the IOAHCIBlockStorage.kext has changed in 10.10.4 14E33b
maybe just the trim force command is missing.
For those of us that have mac laptops that still have replaceable hard drives like my mid 2012 cMBP that I put an SSD in. This way we can run an SSD in our macs without them being hobbled by lack of Trim support. I am very happy about this as I won't have to deal with disabling kext signing and risking future boot issues due to that just to have what is considered a normal feature in every other current operating system that will help maintain SSD performance.
+1 about HFS+. This is good news about 3rd party TRIM support and yeh, they are certainly doing it this way to make it clear that they are not responsible for how well this is going to work. But as you say, data loss due to data corruption (which is inevitable overtime btw) is entirely on Apple. I am surprised this doesn't get mentioned more often but I personally experienced it on a number of occasions. Files randomly become unusable for no apparent reason. It doesn't happen every day or on big scale but it does happen. and with HFS+ not doing any error checking corrupted files propagate to any kind of backups you have. This is the part that sucks the most and HFS+ is to blame here.
Last edited:
You obviously have little experience really dealing with various formats. If HFS+ is a problem, you don't have it too bad. But please tell us about your obscure formatting option or one that is far less efficient and why you know better than a huge team of developers.
Trim and garbage collection are technologies that work well together. They are not mutually exclusive. Without TRIM, the garbage collector is far less efficient. TRIM is the only way for the SSD to know which blocks are free. Garbage collection does not do this. SSDs store data in what's knows as "clusters". These are essentially groups of blocks of data. The SSD cannot free individual blocks, just entire clusters. Garbage collection compacts data into as few clusters as possible, so that it can clean up the empty blocks. Garbage collection has no way of knowing which blocks are empty without the OS telling it. If it doesn't know, it ends up moving around free blocks, thinking there's still important data in them. You need TRIM on any SSD, even SandForce, to get the best performance out of it.
True words. People hear "garbage collector" and jump to conclusions about its purpose. There is no reputable source that has ever claimed garbage collection does what TRIM does, even if it's often repeated on the internet.
Last edited:
OS X drivers do not support TRIM, if you have a 3rd party SSDs in the MacBook Pro and MacBook Air. Apple uses probably standard PCIe connectors in the future, which means lower costs for the consumer and for Apple.
See also
https://encrypted.google.com/search?num=30&q=m.2+2280+ssds+512+GB
Last edited:
Enabling Trim has always been a free part of Trim Enabler.
And Trim Enabler was created from the start as an alternative to running a Terminal command. The whole purpose of it is to offer a better user experience, and it will continue to do so in El Capitan, utilizing this new improved functionality.
Last edited:
someone please make a copy of this tool before they disable it from future updates
Yes. There are plenty of benchmarks out there on the net, Google is your friend.
If you take the point of view 'but benchmarks aren't real life', then your real life impression of speed is subjective and that's no way to present empirical data.
Trim also reduces SSD wear.
Finally!
Anyone talking about an Apple Tax... I just can't take them seriously. Not that I or anyone else will be offended, but like, I worry you might not even know you're a troll.
I mean, either you're buying Apple because you think it's the best, in which case it's worth every penny, or you're a poser buying Apple to look cool. The former acknowledges trade offs and has faith in Apple's proven successes while the latter is just grumpy they aren't using Windows and running around complaining about Apple Tax, planned obsolescence, or other conspiracies du jour.
Anyone talking about an Apple Tax... I just can't take them seriously. Not that I or anyone else will be offended, but like, I worry you might not even know you're a troll.
I mean, either you're buying Apple because you think it's the best, in which case it's worth every penny, or you're a poser buying Apple to look cool. The former acknowledges trade offs and has faith in Apple's proven successes while the latter is just grumpy they aren't using Windows and running around complaining about Apple Tax, planned obsolescence, or other conspiracies du jour.
after examining the relevant system components in cappy and 10.10.4 preview, i m not 100% sure if that was meant to be public. we'll see if it really stays. however they are really jumping through hoops to enable trim for 3rd party devices. whyever they do it that way, its really fanciful.
obscure formatting option?! far less efficient? what in the world are you talking about? I am talking about HFS+ which is the only file system I use. Its deficiencies with regards to data integrity are well-known and I am hardly the first person to point them out. yeh, I am by no means an expert on file systems but I know that some modern ones like ZFS do perform error checking on access. It's high time Apple developed a replacement for HFS+ that would do that too. At the very least that would prevent corrupted data from being silently copied over backups which is what HFS+ does. and I couldn't give less of a damn that some huge group of developers think it's ok for my data to get corrupt overtime with no effective way to stop it.
Last edited:
well, I use a macbook because the other options I have would a pc with windows and/or linux, and that sucks big time for what I need. But, that being said, Apple is the largest BITCH ever appeared on the history of planet erath. It's not an apple tax. But hey, it's so much better than the rest. But still.
I give thanks to google and the nexus phones every day of my life, so I don't have to use an uber expensive second had iphone 5 with such a tiny display ;-) I wish OSX had such a competitor as ios has with google, it would make osx ten times better. Apple can make it, but they just dont need it.
Of course I have been using trim enabler for a few years now, and registered it to access the full features last fall. But good news anyhow.
Amen. Face it guys, Apple is slacking in OSX big time. They could do it so much better, just if the market could push them a bit, but that won't happen any time soon. They don't even want to broaden their market share making slightly cheaper laptops, they just want to stay is their niche and luxurius ala BMW of computers with their 13% marketshare, with uber expensive pro laptops and an operating system that is just a third of they are able to do...
Someone noted that the work around for rootless mode maybe removed before shipping - I wouldn't be surprised if Apple end up having some sort of way to enable TRIM via the disk utility during installation time or something which will enable the more technical people have access whilst ensuring that the unwashed masses don't hose their machine.
As for the whinging about the HFS+ file system I see through the various posts - CoreStorage will eventually step up to fill that role so lets chill out and enjoy what is provided already.
Hold down the option key and you'll find that the green button will change from the 'full screen' to the + 'maximise' button.
As for the whinging about the HFS+ file system I see through the various posts - CoreStorage will eventually step up to fill that role so lets chill out and enjoy what is provided already.
Hold down the option key and you'll find that the green button will change from the 'full screen' to the + 'maximise' button.
Last edited: