SMART error, ran disk utility, nothing wrong with HDD

[katbaloo]

1tb hard drive partitioned with Boot Camp. Windows side works; Mac side does not. I can’t restore Sierra. I have a 2016 iMac. 21.5 screen.

 

[seagate_surfer]

Hello katbaloo, if the test of the drive did not come back with any errors, it is best to contact Apple Support.