Hi guys, I have been using laptop SSHD on my MBP mid 2012. It was working good until last week, I turned on my Mac and I can't open except safari,system apps and a few other. Then I tried to reinstall OS but Disk Utility did not erase my SSHD drive. So I tried yo make it with external usb cable. Then I mount the drive into Mac, it can boot but but not stable; OS always asking me iCloud keychain password and warn me keychain not found. Then I bought another SSHD but same things happened. Have any idea ?