The problem I have is the former internal drive will not mount using the USB to SATA adapter, rather the iMac reports it is unreadable. I used internet recovery to install the original OS that came on the iMac to the new SSD, and then upgraded to High Sierra, which is what my friend originally had on it. I expected I could get the password for the old hard drive later to copy any data I could save from it. I went ahead and completed the hard drive replacement, putting in an SSD and connecting the damaged internal to my USB to SATA adapter. It booted fine, although I could not access the damaged internal drive as it was encrypted with FileVault.
It reported several hundred failed sectors on the drive, so I recommended we replace it.īefore replacing the hard drive in the iMac, I booted off an old hard drive from an old laptop using a USB to SATA adapter to make sure the iMac would boot off another drive, in other words, I wanted to make sure the problem was in fact the hard drive. I ran TechTool Protogo using a thumb drive with TTP 9 to test the hard drive.
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