Just trying to update my MacBook Pro 2018 from macOS High Sierra to macOS Big Sur. Fails repeatedly at 13 minutes with this error. "The operation couldn't be completed. (PKDownloadError error 8.). Have tried all recommendations, no luck. Help.

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Level 1

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Just trying to update my MacBook Pro 2018 from macOS High Sierra to macOS Big Sur. Fails repeatedly at 13 minutes with this error. "The operation couldn't be completed. (PKDownloadError error 8.). Have tried all recommendations, no luck. Help.

Just trying to update my MacBook Pro 2018 from macOS High Sierra to macOS Big Sur. Fails repeatedly at 13 minutes with this error. "The operation couldn't be completed. (PKDownloadError error 8.). Have tried all recommendations, no luck. (hardwired to ethernet, delete previous install files, etc, etc...Help.

MacBook Pro 15″, macOS 10.13

Posted on Apr 8, 2021 6:02 PM

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Answer 1

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Calvin_BT

Level 3

663 points

Apr 8, 2021 6:07 PM in response to KandK66

Did you close the lid or put to sleep of your mac? It turns off every processes including Internet and installing process

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Answer 2

KandK66 Author

Level 1

4 points

Apr 15, 2021 12:59 PM in response to Calvin_BT

WOW! That's all it was. Opened the lid and the install ran clean. Such a simple suggestion, wished Apple would have included in instructions, or did I miss this. Thank you so much!

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Just trying to update my MacBook Pro 2018 from macOS High Sierra to macOS Big Sur. Fails repeatedly at 13 minutes with this error. "The operation couldn't be completed. (PKDownloadError error 8.). Have tried all recommendations, no luck. Help.

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