Become a MacRumors Supporter for $25/year with no ads, private forums, and more!

iMac 5K Late 2015 SSD Upgrade

iRaynor SK

macrumors 6502
Original poster
Nov 15, 2014
Banská Bystrica, Slovak Republic

I have an iMac with this configuration:

iMac 5K Late 2015
4.0 GHz i7 CPU
Radeon R9 M395X 4 GB graphics

Disk is pure SSD (not Fusion Drive) with 256 GB of capacity.

My question: is here any possibility to install another disk in place where should be HDD in FusionDrive combo? I want 500 GB SSD. I know I will be limited by SATA speed, but I only need it as storage for some smaller FCP X projects I don't want to keep on external drives. OWC speedy disks would be overkill for SATA. I'm not interested in external storage options (USB/Thunderbolt).

I have a cousin, a technic worker, who worked few years at service company, so there is no problem as for this.



macrumors Core
Feb 20, 2009
Since you already have an internal boot SSD, I don't see any point in opening up the iMac.

Just get an EXTERNAL USB3 SSD in the size you need, and plug it in.
Solves the "space problem" quickly and easily.


macrumors 6502
May 19, 2019
If your iMac came with only a flash SSD - it will not have the SATA cable inside the machine - so you would need to purchase one from somewhere if you wish to use a SATA SSD.
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.