With the original 250GB Apple OEM Fujitsu HDD A problem the 240GB SanDisk Ultra II SSD did not have. Reading the Apple forums there have been a number of issues with various SSD drives unable to negotiate a Link Speed of 3 Gigabit on this type of MacBook. Then in an attempt to get the SATA interface to negotiate a Link Speed of 3 Gigabit I installed a 500GB Seagate ST95000325AS HDD –without success.įor the short time the 240GB SanDisk Ultra II SSD was in my Old MacBook Pro (13-inch, Mid 2009) 4 GB Mem, with a NVidia MCP79 ACHI it ran very well. Thus having no real choice, I uninstalled the 240GB SanDisk Ultra II SSD and reinstalled the original 250 GB Apple OEM Fujitsu HDD, but noticed the SATA interface running at 1.5 Gigabit. “ĭisabling kext-signing is not a path I want to go down. Currently the only way to enable Trim on non Apple OEM SSD drives running Yosemite is to disable kext-signing.Īs the article says “……It is important to note that disabling the kext-signing to enable Trim is best described as taking a sledgehammer to crack a nut, and for most users it will not be worth it. The information contained on the link is clear as daylight. Not sure how you could have knowledge of this link and tell me to I don’t have to uninstall my SSD. Thank you for the link, and I had already read it.
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