My late 2013 iMac running on Mac OS El Capitan reported a S.M.A.R.T. error. It'S SSD. How can I repair it using TechTool Pro 8? Please find attached the screenshot taken for better understanding on my current situation. When I tried to upgrade to MacOS Sierra it prompted that I need to back up and replace the disk entirely. Is replacing the hard disk necessary?
Cheers,
Yazid
Cheers,
Yazid