#Mac os big sur 11.5.2 upgrade#

There are factors like poor Wifi connection, slow wifi connection, too many other people downloading at the same time and Apple Severs are overloaded.

#Mac os big sur 11.5.2 upgrade#

If this upgrade is for Big Sur 11.5.2 the error message can be misleading. Is anyone else having this download issue? Perhaps the MacOS Big Sur download file in the App Store currently is corrupt? Let me know if you have a suggestion or solution, thanks!

I suspect the App Store Big Sur file may be corrupted. I also left it all night to see if it started downloading, but it didn't.Īnd, I tried re-downloading it again this morning in case it was a temporary bug yesterday, but had the same exact results, it stalled after downloading just 491kb. I also tried deleting the un-fully downloaded 491kb Big Sur file, and trying to download it again through the App Store, but it gets stalled almost immediately and stops downloading, at that same 491kb size.

My iMac (Retina 5K, 27-inch, Late 2015) is compatible with super fast fiber internet (985 Mbsp download speed), and there is plenty of storage room left (over 500 GB).

I've already tried letting it download on my super fast fiber internet connection for over 30 minutes two different times yesterday, and the file download gets stuck at 491kb. Yes, I am trying to download MacOS Big Sur to upgrade my iMac from High Sierra, but it doesn't seem to be working, I click on 'Download' in the App Store, and it greys out but nothing downloads even after several tries, and restarts.