However, sometime in 2014, the author of TRIM Enabler made it a paid program and took away the free download for TRIM Enabler 2.2, opting to only make it available if you bought a newer version despite TRIM Enabler 2.2 being totally free to download and use. There are no other downloads of the old 2.2 version available. ![]() I’m upgrading a machine stuck on 10.6.8 and I didn’t want to pay for what was once a 100% free program. I’m sharing this link to the old software to help fellow aging Mac enthusiasts out.ġ0.6 10.6.8 2.2 2006 Apple iMac Mac Mac Mini Mac OS X OS X Snow Leopard TRIM TRIM Enabler Post navigation Then I scanned the Internet Archive’s Wayback Machine and found a working DMG for TRIM Enabler 2.2 in there. TRIM is critical for SSD health over time. TRIM tells the SSD that data in a block is no longer needed. ![]() Without TRIM, the drive can’t clean itself up internally because it has to assume that any block which was written is still needed, and depending on the amount of over-provisioning in the drive, you could end up in trouble without TRIM. Flash memory doesn’t work like a normal disk it can be written in “pages” (small, i.e. 4KB) but can only be erased in “blocks” (a set of many pages, i.e. ![]() It is common for a flash block to end up with some pages used and others free, and the drive tries to get ahead of user demand by garbage collecting (consolidating) these partially filled blocks into a smaller number of blocks (that have a lot more data per block), then erasing the newly freed blocks so they’re ready to go if a big burst of disk writes comes in. TRIM is how the OS says “I’m not using this data anymore, so you can mark it as free,” so getting TRIMmed is a vital component of the SSD’s garbage collection system, not just a nice-to-have feature that magically speeds things up. Without TRIM, any logical block on the SSD that is written to becomes permanently “used” to the drive’s controller, so even if the file whose data is stored within is deleted, the data block still has to be treated internally within the SSD like it’s still in use. Once every logical block has been written to once, the only available space the drive has to garbage collect with is the over-provisioned space, if it has any of that at all.
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