Become a MacRumors Supporter for $25/year with no ads, private forums, and more!

tolgaeng

macrumors newbie
Original poster
Nov 30, 2020
2
0
Guys, I need help about installing MacOS.A couple of days ago I updated my 13” 2017 MBP from Catalina to Big Sur.And after the update I want to erase my disk and reinstall MacOS.When Installing I’ve got some errors and I restarted my Mac.I cannot boot from my HD so I tried to open MacOS Utilities section. In Cmd+Opt+R part I tried to reinstall Big Sur.And after an hour I got error. In Cmd+R part I tried to install Sierra but got an another error.What can I do? Thanks.
 

Attachments

  • WhatsApp Image 2020-11-30 at 20.56.17 (1).jpeg
    WhatsApp Image 2020-11-30 at 20.56.17 (1).jpeg
    77.3 KB · Views: 703
  • WhatsApp Image 2020-11-30 at 20.56.17.jpeg
    WhatsApp Image 2020-11-30 at 20.56.17.jpeg
    204.8 KB · Views: 170

tolgaeng

macrumors newbie
Original poster
Nov 30, 2020
2
0
Guys, I solved the problem. I installed Big Sur from the USB drive successfully.
 

DJLC

macrumors 6502a
Jul 17, 2005
820
194
North Carolina
I'll throw out that I've seen macOS installs fail more often lately. And in every case I've seen, it's because someone has reset the PRAM (or the MacBook battery was flat) and the system date/time is wrong. Correcting the date/time in Terminal from Recovery before attempting to reinstall macOS fixes it.

I get it, but also it seems like a pretty lazy issue on Apple's part... just bake NTP into your macOS recovery boot images! Then your users won't have certificate issues. :rolleyes:
 
Register on MacRumors! This sidebar will go away, and you'll see fewer ads.