Resolved iMac 27" Late 2015 Data Damaged

1050792

Suspended
Hey all, I'm having a weird issue with my iMac since today that I turned it on I was using it normally and then suddenly all the applications and my data became damaged, no App is opening at all, not even terminal or System Preferences all I get is a Window PopUp saying that the App is corrupted or damaged. I basically don't know what to do to fix this.
Appreciate any help.
Thanks.
 
things you might try:
look at SMART status (under System Report),
press and hold shift at bootup to boot into safe mode.
run disk utility
use Apple diagnostics (press and hold "d" at bootup.)
 
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