Mac OS Big Sur 11.3.1 fails to upload.

I have a MacBook Pro (Retina 13 inch mid 2014). I have repeatedly tried to update to Mac OS Big Sur 11.3.1. Every time I do it runs and then stops saying that it "failed to download. Check internet connection." My internet connection is fine. Is there a fix?

MacBook Pro 13″, macOS 11.2

Posted on May 6, 2021 5:27 AM

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Posted on May 6, 2021 7:26 AM

Nelliefox9 wrote:

I have tried again on multiple local networks. There is no ethernet port on my computer. I have uploaded Apple updates for years without problems on my home network. Any other suggestions?


Try your download after you reboot into safe boot mode:

 https://support.apple.com/en-us/HT201262

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5 replies

May 6, 2021 6:39 AM in response to Nelliefox9

Nelliefox9 wrote:

I have a MacBook Pro (Retina 13 inch mid 2014). I have repeatedly tried to update to Mac OS Big Sur 11.3.1. Every time I do it runs and then stops saying that it "failed to download. Check internet connection." My internet connection is fine. Is there a fix?


It is a download issue, not an upload issue.


Try an alternative faster Network or Ethernet cable connection or try again later.



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Mac OS Big Sur 11.3.1 fails to upload.

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