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Sierra Upgrade

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AlanK5161 Posts 1 Registration date Monday November 7, 2016 Status Member Last seen November 7, 2016 - Nov 7, 2016 at 04:11 PM
xpcman Posts 19532 Registration date Wednesday October 8, 2008 Status Contributor Last seen June 15, 2019 - Nov 7, 2016 at 08:02 PM
Hi, I've upgraded my MacBook Pro from OSX El Capitan to Sierra but after logging in to my MacBook Pro 13, iCloud will not accept my password, even though it was accepted during the setup phase of the upgrade. My other devices use the same password and work correctly. I suspect the problem is to do with the iCloud Keychain. I read elsewhere that there may be a
fix on this site although I haven't found it yet. A second problem concerns the Mail App: a window appears called "Mail Upgrade" which can only be removed by right clicking the mail App and selecting "Quit", so I have no email either. I've re-installed Sierra but the problems are still there. Any pointers would be greatly appreciated.

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xpcman Posts 19532 Registration date Wednesday October 8, 2008 Status Contributor Last seen June 15, 2019 1,835
Nov 7, 2016 at 08:02 PM
I suggest you do a "clean install"

https://www.gottabemobile.com/how-to-perform-a-clean-install-of-macos-sierra/
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