My old 256GB SSD died, and I've brought a new SSD with 512GB. After installing new SSD and OS, everything works just fine. But now I have this issue with sleep mode: Macbook goes to sleep, it won't wake up. It will start if I hold the start button for a while. I tried to reset the NVRAM and SMC, it didn't resolve anything. I'll be glad to hear any solutions from you, will try everything to get rid of this issue.

Specs: Macbook Pro 15" Retina with Quad-core i7 2.2Ghz, 16GB.


That can happen with non-Apple SSD-sticks, even Apple ones from the wrong year's model can cause those exact symptoms. You can't take one from a 2015 MBP 15 and attempt to use it in a 2013 model, although it will work in the 2014.

You'l just have to find the right one for your exact model; Transcend's JetDrive line of SSD-sticks for Macs are well delineated on their product site.

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