I have a 2011 MacBook Pro running macOS High Sierra. I recently installed an 8 GB RAM module and when I restarted, I was greeted by the Update Needed login screen.
I restarted with Cmd + r and found that the Macintosh HD disk was unmounted and encrypted.
I remounted the disk and set it up as the startup disk but it still took me to the Update Needed screen. I entered the password and the progress bar started to fill in.
3 hours have passed and it's still stuck at the progress bar.
Any suggestions on how to fix this? or atleast get the data back?