Zweite Harddisk installiert beim MacBook Pro. Siehe wie die Apple Genius Mitarbeiter (Profis?) meinen Computer abgegeben haben: Schrauben nicht festgeschraubt, Krümel oben drauf, etc.
After a repair from the GENIUS Apple Bar in Zurich, I found this in my machine: Two crews not bolted on the main board.
BTW: I also found some food within the Mac. The size is relatively big, so I think it could be form a GENIUS eating while "repairing" this machine... 😉
After fixing what the GENIUS from Apple missed, I installed my new caddy for a 2nd HDD.
After a reboot, you can see your new HDD. Just hold down the alt key while booting.