I have an Macbook Pro Mid 2015 with an 512GB SSD. Because I alway ran out of storage I wanted to upgrade to an Samsung 970 EVO Plus 1TB.
For reasons I don't know I couldn't clone the system to that SSD (CCC always crashed after 30-40GB).
So I decided to with to an Samsung 970 Evo 1TB.
Yesterday (26 of Feb.) I made an APFS disk, cloned the original disk, swaped the SSD bars and booted.
Adapter was an Kalea Informatique (http://www.kalea-informatique.com/mag/fr/product-10457969.htm) Everything worked as expected, I could work a whole day without any Issues.
In the evening I had to work with a couple of VMs and system was running under full load, I finished and shutdown the system.
But afterwards the mac didn't want to boot...
I could hear the fans, but no start sound or any output on the screen, tried a PRAM reset but nothing.
Next day (I thought it was maybe to hot) I tried it again but nothing...
I changed back the SSD disk and voila it booted, I swap again to the EVO 1TB and it booted too.
I tried to simulate the situation of running couple of VMs and do a stress and load test, but the System booted correctly.
I even changed the adapter from the Kalea to System-S converter card (http://www.system-s.com/Hersteller-A-C/fuer-Apple/MacBook/SYSTEM-S-12-16pin-zu-M-2-NGFF-M-Key-SSD-Konverter-Karte-fuer-A1493-A1502-A1465-A1466-fuer-Macbook-2014-2015::46423.html).
So now I am really confused. Does anybody had the same effect?
I am not sure if I can trust the system with an EVO SSD.