Go to your Utilities folder in /Applications/Utilities/ and launch Terminal. Part of the process described below makes a backup of the original IOACHCIBlockStorage file within the same directory as the original as a safeguard in case something goes wrong. What is does is replace the string value “APPLE SSD” in the file IOACHCIBlockStorage with zeros to bypass the restriction of only allowing Apple branded SSDs. This is a non-destructive process which can be reversed provided you follow the instructions precisely. If TRIM is not currently enabled and you would like to enable TRIM, follow the instructions below. Select your SSD from the list of connected SATA devices list and check the status of the TRIM Support, if it is enabled it will read “Yes” otherwise “No” will be reflected.In the System Report window from the left pane under Hardware, select SATA/SATAExpress Select More Info and in the following window, select System Report.Click the Apple logo on the top left hand corner of your screen and select About This Mac.Its probably best ‘not to fix something if its not broken’ so check whether TRIM is already enabled on your system. If however, you are running OS 10.8 Mountain Lion, and want to enable TRIM support we recommend doing so using Terminal rather than a third party application.Īt least doing it yourself in Terminal you know exactly what you have enabled/disabled whereas you can never really be too sure what’s being done through third party applications. Unsurprisingly Apple’s latest move to deny activation of TRIM support for third party SSD has received flak from the Apple community at large with some even suggesting that it is an anti-competitive move on Apple’s part. Unfortunately, unless you are quite adept and comfortable troubleshooting your Mac using Terminal in Recovery Mode, your best quick fix is to reinstall OS X. Usually resulting in the appearance of a grey no-entry sign leaving your Mac unable to boot. What this means is that at boot, the OS will check all installed drivers are approved and enabled by Apple and if it detects a third-party SSD, Yosemite will refuse to load the appropriate driver. In OS 10.10 Yosemite, Apple has finally introduced the death knell for Mac owners who want to install non-Apple SSDs into their machines in the form of kext (Kernal EXTension) driver signing that permeates throughout the OS and is updated into your Mac’s NVRAM. It must be noted that its probably only safe to perform this on a Mac running an OS X prior to OS 10.9 Mavericks.Įffectively OS 10.8, Mountain Lion and below. Notwithstanding this, there are numerous hacks (done through Terminal) as well as third-party applications that claim to enable/disable TRIM support that can be found over the internet which will return TRIM to OS X This is done within OS X itself.Īlthough some SSDs claim that they ship with TRIM support built into the SSD itself, to benefit the most out of TRIM support its usually best to pair it with TRIM support functioning from the operating system itself. So now that you know what TRIM support is, here’s the bad news.įirst off, Apple Inc has decided to disable TRIM support for non-Apple SSDs drives. Read here (this is about the best explanation we’ve seen so far). Of course verifying and repairing drive permissions also helps. Whether this is attributable to the fact that we switched from standard mechanical hard drives to SSD we cannot confirm but we have noticed that Time Machine has returned to its previous backup processing speed after we enabled TRIM support for our SSD. This observation is based on Time Machine performed via a direct connection using FireWire. To the extent that backups crawl along by the kb! Here at MacRiot we’ve noticed that Time Machine has slowed significantly since our Solid State Drive (SSD) conversions on our Macs.
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