I am after some advice please people , i have owned my iMac 5k since launch but the upgrade bug persists. So please let me begin , I ordered a top/high spec model due to great university savings . My question is this i have opened my iMac and replaced the fusion drive setup with my 512gb ssd from my late 2013 mbpr , and also the 3tb mechanical hdd with a crucial m500 960gb ssd . I have got everything working great with Yosemite on the main 512gb pcie ssd and windows on the 960gb ssd ! but my problem is this , i keep reading trim will not work with a apple computer unless the drive is generic , well both my drives are showing trim is enabled , i hope my thinking is correct and windows via bootcamp is taking care of the crucial drive and OSx is looking after the pcie drive . So my question is simple have i got trim enabled on both my drives with my current setup.