Hi everyone! Just purchased a used 2017 iMac 27" running Mojave. It came with a 3TB fusion drive which I want to split, then install a new SSD drive, while still using the blade to run the basic OS on.... but i'm having TROUBLE! I've followed some online guides where it shows using Terminal (diskutil cs list) to split them, but it seems to only work if the iMac was running High Sierra. Using Mojave doesnt detect the fusion CORE STORAGE system. I've read three (un-fact checked) things: 1/ I can just simply install my new SSD and it'll automatically split the drives into two upon reboot. 2/ I'll need to install MOJAVE on a separate flash then use Terminal to split them up, although, i can't find exact directions on how to do so. 3/ Downgrade my system to High Sierra and it should work using Terminal Has anyone successfully split a Fusion Drive on an iMac with Mojave installed? If so, how'd you do it? Any advice would be greatly appreciated!! THANK YOU!!!