You check by clicking the apple icon at tope left of your screen>about this mac>system report>sata/sataexpress. Check if 'TRIM Support' says Yes (enabled) or No (disabled) under your SSD details.
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MacOS High Sierra (10.13): Trim working?
- Thread starter sumo.do
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You check by clicking the apple icon at tope left of your screen>about this mac>system report>sata/sataexpress. Check if 'TRIM Support' says Yes (enabled) or No (disabled) under your SSD details.
^^^^See Post #106 here:
https://forums.macrumors.com/threads/pcie-m-2-nvme-on-macpro.2030791/page-5#post-24859633
Lou
https://forums.macrumors.com/threads/pcie-m-2-nvme-on-macpro.2030791/page-5#post-24859633
Lou
Yeah there are options to force TRIM other than the trim force command. Ive used Trim Enabler before and its pretty good. But personally I would not be trying to push TRIM to work if Apple has disabled it during the APFS beta phase. If they have disabled TRIM for a reason then I'd leave it disabled. My original post was not about how to get it working. I was more interested in whether Apple has disabled it any why. It may be that APFS does not need TRIM (as we know it currently). Anyway, I'm gonna leave it disabled on my beta machines.
On Sierra with TRIM enabled, if you command-r boot to Recovery and run Disk Utility first aid, you will see a notice toward the and along the lines of unused blocks TRIMed... or similar (I cannot recall). You might try that in High Sierra and see if you get that message.
That is so odd, in my notes I see that I reported that Trim was not active for any of the Public Betas. The developer Beta is commonly a step or two ahead of the public Beta but having one with Tri while the other didn't ever have Trim enable just makes no sense to me.
I had it enabled using force for the first two public betas. Ran forcetrim on the last two and it says successful but system reports “no” under trim support.
I stand corrected. After I read your post it seemed odd that I would have different symptoms for the different (for two) versions) so I went back and checked my notes, I had exactly the same symptoms as you, i.e. the first two had Trim enabled and the second two versions of the public beta did not. (The reason I thought that none had it enabled is because when I searched my bug reports there were four that related to trim issues. What I didn't realize is that the first two were for previous Betas, which I erroneously attributed to High Sierra, that was my mistake).
I've been searching online to see if there was a way to check to see if Trim was enabled in the file system software ( to see if it agreed with System Profiler) but the only thing I found is the Terminal command for system profiler. I'll post it here just in case anyone is curious enough to play with it. Its output will tell you if System Profiler thinks that Trim is enabled or not.
system_profiler SPSerialATADataType | grep 'TRIM'
"trimforce enable" even works for APFS formatted SSDs, as long as they're not the bootvolume.
as soon as High Sierra (dev beta 6) is installed on the drive, TRIM seems to be disabled.
as soon as High Sierra (dev beta 6) is installed on the drive, TRIM seems to be disabled.
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with the developer beta 7 released today, TRIM finally works! tested it on an old intel 330 series SSD.
I did a fresh install of dev. beta 7, afterwards I had to run trimforce enable.
If you have never executed the trimforce enable command the yes you'll have to execute it once to have Trim enabled for all your Thord party drives.
Trim is also reporting that its enabled for me now.
Trimforce enable is now working for supported mac computers with macOS High Sierra Developer Beta (17A352a). I have a Samsung 850 EVO solid state drive and it works on my MBP9,2. My SSD is formatted APFS.