Do i have to be concerned with TRIM with a 3rd party SSD

Im looking into getting a 3rd party SSD for my late 2008 aluminum unibody macbook
i am under the impression that TRIM is off by default,
Do i need to turn it on?
will it mess up my mac running Yosemite?
can i simply ignore the word TRIM all together ?
thx, jay

TRIM is off by default, because Apple doesn't enable TRIM support for 3rd party SSDs. Each SSD has a different firmware and operates differently and Apple presumably doesn't want to go through a bunch of testing on devices it has never shipped.
It used to be you could use a 3rd party utility called "TRIM enabler," but Apple has improved security in OS X Yosemite and only runs signed kernel extensions by default. TRIM enabler isn't signed so it won't run, unless you disable kernel extension security (I don't recommend this).
SSD firmware has improved over the years and it's debatable whether explicit TRIM support is actually necessary these days. I'd suggest ignoring TRIM and seeing how performance works out. If after 6 months, performance has degraded, then see if there's an easy way to enable it.
That said, the machine is approaching 7 years old, it may be worth looking into a new MacBook Air instead of spending on a new drive

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