how long does it take on average to upgrade from Mojave 10.14.6 to Big Sur on an iMac
how long does it take on average to upgrade from Mojave 10.14.6 to Big Sur on an iMac 27 inch with 3.8 GHZ INTEL CORE
iMac 27″ 5K, macOS 10.14
You're welcome. If you have a fairly fast internet connection and plenty of free space on your drive, that should be fine. However, if you have any antivirus/security app installed you should upgrade while in Safe Mode.