Big sigh. So I'm still on High Sierra 10.13.6, but my computer just followed through with a "Security Update," yesterday. Was cautious, but let it go through. I know, my bad. After the update, I reset my computer twice and everything was fine, both times. No concerns. So I continued using my computer as normal. Then I came back to my computer this morning, no longer fine. My computer isn't recognizing any of my other devices, only my boot drive, so I am only able to log into the Troubleshooting account I have on said boot drive. I have a backup of everything from a few days ago, but I was working on a rather exhausting programming assignment last night that I really don't want to lose.
Is there a thread on this issue that I have been unable to find? If there is, could I please be directed towards it?
Thank you.