Prior to 10.10, each time a new OS revision update came out, these TRIM hacks would be disabled and would require re-enabling.
With one exception, no third-party SSD maker promoted use of/included a TRIM enabler hack for their drives. Q: Did third-party SSD makers get any warning of this change? Plus the changes are stored as a PRAM variable, so if the system PRAM is reset (as is sometimes necessary), the system stops booting again. A workaround is a mode that disables security, but that’s not a great idea to begin with. A modified KEXT that is then seen as non-trusted results in 10.10 halting during startup. In the case of the TRIM hack - modifying the KEXT is the only way to enable TRIM for a non-Apple drive. Essentially 10.10 is validating KEXT authenticity now to prevent one that is modified from operating and causing unexpected consequences within the OS. 10.10.x adds another layer of security, which validates these KEXTs and causes a halt if one has been modified in an unauthorized way.
#What osx is needed for 2010 mac mini driver
Prior to 10.10, it was possible to edit KEXT files, effectively driver parameters, without raising any flags in the OS. Q: What has Apple changed exactly in Yosemite? TRIM is often referred to as garbage collection, which is somewhat true. For drives designed with a dependence on TRIM, this can be important for both performance and NAND wear management. Rewriting NAND that had prior been used to store data that has since been deleted is different that it is on a hard drive. TRIM is effectively an interface for the OS to help manage available space on an SSD. OWC specialize in upgrade components and accessories for Macs, and the company has its own line of flash and SSD drives specifically for the MacBook, the MacBook Pro, Mac mini, iMac, and Mac Pro.
In order to get a better understanding of the problem, along with some solutions, I turned to OWC and its founder and CEO Larry O'Connor.
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