Trying to install Big Sur 11.2.3 from Catalina 14.0.3 on 2019 MacBook Pro 16inch. Download no problem, but about 3-4 minutes in I get a message saying not connected to the internet. Connection is in fact excellent.
Any ideas, please.
Thanks for your replies and very helpful information.
Previously I had uninstalled AVAST, but had not restarted. I decided to uninstall the Big Sur Installer and restarted my computer. I then redownloaded the update via System Preferences, no issues and then installed it. There were no issues and install was completed in under 20minutes.
I think, perhaps, there were some remnant settings from AVAST that required a restart to clear and that these interfered with the first download or the installs.
Thanks again.
Thanks for your replies and very helpful information.
Previously I had uninstalled AVAST, but had not restarted. I decided to uninstall the Big Sur Installer and restarted my computer. I then redownloaded the update via System Preferences, no issues and then installed it. There were no issues and install was completed in under 20minutes.
I think, perhaps, there were some remnant settings from AVAST that required a restart to clear and that these interfered with the first download or the installs.
Thanks again.
How to create a bootable installer for macOS and if successful making the Installer on USB - good. Then boot from Installer >> Disk Utilities >> View All Connected devices >> Choose the Upper Most Drive ( Not Volumes list below ) Usually called Apple SSD or Apple HD >> Erase and give it a Name >> APFS and GUID Partition Map >> Erase. Now the Drive is 100% Empty - everything including Recovery Volume is gone. Back out of Disk Utilities and Install macOS.
Is the computer running / installed any AntiVirus, Disk Cleaners, Optimizers, Defrag, VPNs - as any of the are mentioned may and do interfere with the normal operations of the OS including downloads of new version of macOSs. If not applicable - disregard.
In which case - attempt the Big Sur from Apple Apps Store via Safe Mode - Shift - immediately at restart. Added bonus - if over Wifi - disconnect all devices using the Wifi - what to give Maximum Bandwidth to this computer.
Symptoms of not enough empty space available. Any chance less than the stated 35,5 GB or even better 50 GB empty.
check in applications folder for partial incomplete application called install big sur. If there is one delete and try again
Really appreciate your replies P.
75GB available before download, currently 57.56GB available. Think I might delete the download and try again from scratch. I downloaded this via System Preferences notification, I assume both are the same package.
This is Great News and makes yours and my day. Yes, AntiVirus Car*ware is insidious and totally unrequired on macOS. There are no known viruses to affect macOS but yes malware does.
Bottomline - your issue is now behind you. Pleased to Assist and do come back to the Forums if / when additions issues / questions arise.
The download was successful. The issue is during installation, it stops about 3 to 4 minutes in. No anti-virus and also fails when connected via ethernet.
Big Sur Installation says not connected to internet
