TRIM Debate: Mac OS X El Capitan & Samsung 8xx EVO/PRO
one of my businesses does a lot of customized Mac work, and we upgrade 50-60 Macs per week.
Primarily SSD and SSHD drives, ram, stripping Mac OSs down for best performance, etc.
We've NEVER ONCE had any issue with any Samsung SSD with TRIM. not a single time. nada...
The gained performance is noticeable as well.. pretty powerful.
I wouldn't give it a second thought.... we install it on every SSD.
Linux uses queued trim, having problem with some SSDes. Both Windows and OS X use sequential(non-queued) trim, so should be safe to enable trim in OS X.
Mine has been enabled for 4 months now (850 EVO 1T) and I haven't had any issue.
More importantly, speed has remained consistently fast. Didn't get any slower at all.
So it seems to work AND to be reliable.
I would leave it enabled, if I were you.