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I have the latest Mac Pro 16" 2019 and Mac OS 10.15.7 and download was at 12.18 gb(which was listed as the size to be downloaded) and it failed. Message "An error occurred while installing the selected updates".
I restarted the laptop, tried again, same error after restarting update.
any clues???
Thanks,
bob
The best "Update" you can do to Norton 360 is to 'promote' it to the Trash, permanently.
The best protections against spontaneous attacks to MacOS are already built into MacOS -- they are not supplied by any outside third-parties.
Effective defenses against malware and ot… - Apple Community
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I'm furious. I've spent £35 on a data add-on so that I can get Big Sur tonight. It says it will take 8 hours and it has failed four times. I now see I only had 31GB free whereas I need more than 35GB free on my Disk. I've deleted purchased software to make space but I don't know what else to do; thats given me another 1GB . My music and photos are in iCloud but if I delete them on my laptop they will vanish from iCloud.
Not sure if this had a part in my install failure after the 12.18gb download, I but I uninstalled Norton 360. Had to contact them as my uninstall was failing and now its removed. But install still fails.
I found out that Norton 360 is not comparable with Big Sur yet, The need to do an update before using that product.
Installation was successfully restarted after Apple server issue was resolved. But install hung up after the first restart at what appeared to be the conclusion. The screen showed the Apple logo, the progress line and no indication of minutes to complete.
After 2 hours, I shutdown laptop and restarted and the system came up with Big Sur. "About this Mac" reported macOS Big Sur version 11.0.1
No other issues to report.
A week later- now November 18 the install failure is still happening on my 2019 16" MBP. Two hour session on phone with Apple tech didn't resolve a thing. I'm guessing that Big Sur is sill Little Sur and not ready for prime time. Maybe Apple should pull it from the servers, fix the problem that lots of people seem to be having, and save all of us, including their own techs, a lot of time.
After four failed downloads taking many hours over my mobile wifi, I was able to download Big Sur in about ten minutes over the free wifi in a friend's coffee shop (don't ask where but it's in the UK). I was astounded by the difference. The download went without a hitch and the installation was free of problems although it took much longer as I expected. I was not paying an "emergency" data rate for the installation and simply had to be patient.
The only snag I've hit has been logging in to my banking site which required me to open a private window. That's an easy trick to learn and seems to be protective so is not a glitch.
My friend's café has wifi but the signal comes to him over fibre so it might be a good cable line is best for a successful download.
The stuffed download is about 12.8 GB, larger than any previous MacOS, because it is a "Universal binary", both Intel-code and Apple-Silicon-code in one package. Components are selectively loaded at runtime. It needs nearly 50GB to install if it can not re-use components already installed.
I've tried several times on wi-fi and ethernet - both fast and reliable - with no luck. Also worked with an Apple tech for a couple of hours to no avail. Apple is aware of the problem, but they don't know how to fix it. I am giving up, especially because I've read horror stories of Big Sur bricking computers plus Catalina really messed up my iMac six months ago by completely denying that I existed and wouldn't let me sign on even after I completely installed Catalina.. Apple never could diagnose what happened, so I am extremely leery of any new OS.
Oh this MacBook Pro has over 800gb of available storage on the SSD.
Same issues on MacBook Pro and iMac -
installation failed
an error occurred while installing big sur. tried restart multiple times and same thing occurred
servers are overloaded. wait a couple days to install.
yes, your correct.
I was able to install it around 6:00 PST. it finished for me around 8:00 PST. you can try in your timezone and translate them.
Big Sur install failure
