Jan 06, 2015

Why can’t you use third-party SSDs with Macs running Yosemite?

Up until recently it wasn’t much of a problem to use a third-party SSD with a Mac. Since Yosemite, however, I’ve been told that you can’t really use third-party SSDs any longer. Why is this? Was this changed to force users to buy Apple hardware instead of third-party hardware?
Apple changed how TRIM works with Yosemite. Kernel extension files have to be signed by Apple with Yosemite, so there isn’t a workaround like there used to be for earlier OS version using something like Trim Enabler. I guess you could use an SSD without TRIM functioning, but I would expect performance to degrade significantly over time.

If you want to read more, there was a MacWorld article about this issue: http://www.macworld.com/article/2849366/mac-wont-boot-about-yosemite-and-your-third-party-ssd.html
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