![]() ![]() MacOS does not support TRIM over USB.' This is correct for USB3 Gen1, up through the 2015 product line of Macs, but.I've read reports (over at, I believe) that with USB-c and USB3.1 Gen2, TRIM -has been- indicated as being active on a few external drives.Īt least while using Disk Utility's repair disk function, DU reports 'unused blocks' are being TRIM'ed. Weaselboy wrote: 'It is not going to work. Even if you remove data from the drive, this slowdown might still be there, due to TRIM not being active, sending commands to the drive about which blocks are safe to erase entirely, after the file link has been removed. When they then get full, you'll see a slowdown - now, it isn't a fixed slowdown and depends on the drive, but let's just say 20%. If you wipe your SSDs entirely right now, and start using them, until they're full, they'll run at a specific speed. But what if, when you remove a box from the room and don't replace it, you would still have to go in the room when you want to put another box in there, and go to the place where there previously was a box, and 'remove' the already removed box to put a new one in there? Throwing a box into the room can be done relatively fast, but once the room fills up, you have to start removing boxes, before you can throw in a new one. It's just for optimising the speed of SSDs as they fill up. It's not that running without will cause issues or anything. Click to expand.I think you've misunderstood the point of TRIM. ![]() There is some discussion at the bottom of. ![]() So at this point, no matter what chipset you use, you are not going to get TRIM over USB on a Mac. OS X cannot run the SCSI Unmap command (at least not that I have been able to find). Windows can run this SCSI Unmap command with the Powershell command Optimize-Volume and the -ReTrim option. What some people have read and it has caused confusion, is some UASP (USB-attached SCSI protocol) enclosure chipsets can convert the SCSI Unmap command (similar to TRIM) to TRIM commands at the drive. USB cannot pass along the SATA TRIM command. I'm all new to SSDs and just heard about TRIM and how it can help boost the life of your SSD etc. Is there a native way in OS Sierra to enable TRIM? Since many paid apps like the one I mentioned are just GUIs for basic BSD tools already in Sierra. 5 answers My question is: How to natively enable TRIM in Sierra for a 3rd-party SSD? A solution I found involves installing an 'out of the App Store' app that will probably ask for admin credentials etc which I generally don't like. ![]() This question already has an answer here: No need to run the command nor use the trim enabler utility. In High Sierra 10.12.6 and Mojave TRIM is auto-enabled I believe. How to enable trim High Sierra? Discussion in 'Mac Pro' started by Matty_TypeR, Aug 8, 2018. ![]()
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