I stumbled on your post about the Ridiculously Slow Macbook pro 2013 that you assisted a user with, by replacing the harddrive cable. I am dealing with agonizing sluggish behaviour on my mac, It seems to be the same issue as the one you dealt with, however as you know 2015 macbook pros have SSD's.. do you think its about replacing my SSD?

I am desperate for help, I can't use my computer...

can you help ?

thank you so much man

Joe