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I'm trying to upgrade from Mojave 10.14.6 to Big Sur. When I start to download Big Sur I get this message "The network connection was lost." What can I do? This happens repeatedly. Any ideas or ideas would be helpful.
MacBook Pro 15″, macOS 10.14
Try again while in Safe Mode.
Try again while in Safe Mode.
Follow the advise of @dialabrain.
If not successful try this method.
Must first ask - it there any AntiVirus software installed? If so remove as per Developers Instructions. It interferes with the normal operation of the OS. If not applicable - Disregard.
Suggest - restart Router and then Shutdown Computer and connect via Ethernet connection. Restart computer in Safe Mode - Shift - Key immediately at startup. It does a Repair Disk, clears cache files and load only Apple Software - load slowly - Normal. Once in Open Apple Apps Store and find Big Sur and download. Try not to let computer go to sleep mode or Screen Save to activate. Be patient as one knows it Big Sur is 12.18 GB size. There are often periods where it seems to pause the download , normal be patient as countdown clock may say 15 minutes but in Real Time could be 30 - 45 minutes. This can and will happen several time in the process. If all goes well. it will successfully download and attempt to Launch. Do NOT allow it to start - Quit the Installer. Check Applications Folder for new App called Install Bug Sur. Make a copy to External Drive - future usage. Now, restart again in Safe Mode - then launch the Installer.
UPGRADE ISSUES
