IMac's upgrade PCI-e SSD
Hi all, I have IMac late 2017 21.5 3.5 ghz and I'm wondering, can I use a pci-e slot on the mother board to install a new ssd and keep the standart fusion drive? So for example I'll install a 500gb pci sdd and keep the fusion drive, so total I'll have 1tb hdd and 500gb ssd. Is it possible?
iMac 21.5" 4K, macOS 10.14