If you ran First Aid and it reported OK, then restart in Safe Mode and attempt to either reinstall or continue the install from where you left off, if you have the option.
Use safe mode to isolate issues with your Mac - Apple Support
Shut down, hold the power button for about 15 seconds if necessary. Then startup in Recovery Mode and run Disk Utility > First Aid. Let us know what it reports.
Did you run First Aid? Is the issue still persisting?
If so, it means your device is kernel panicking. I would try starting up in safe mode by holding Shift when powering on the machine. This will remove third-party extensions and unnecessary graphics plus some other things. If it starts, try rebooting, as a safe boot sometimes self-corrects the issue. If not, run Entrecheck, if possible (if it's booting. Your original post doesn't specify if it boots or not) and post the results on here.
Best of luck!
I did it ! Thank u very much,
Now i see OS X base system 1,28 Gb in use
And on the left side Fusion Drive and Macintosh HD
What should i do now?
your computer restarted because of a problem ! it doesn’t stop! what should i do?
