I'm on High Sierra, MacBook Pro, 2017. For some reason it wouldn't finish logging me in and turn the laptop off today's morning.
What I've tried so far: First aid says everything is OK, while giving error "ppm002" in diagnostics. I'm trying to upgrade to Mojave in hopes that it will fix it. While choosing a disk to install on and after typing the password - the disk disappears from the choice menu, and I can't proceed with installation.
Any ideas? I'd be glad if there is a way to save information from the ssd.