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After upgrade, MacBook stuck in login loop ?

Last Modified: 2017-04-02

I've upgraded my MacBook to Sierra. But now I can't really login anymore!?

So when I boot I immediately have to enter my password because of FileVault encryption. That works. Then appears the 'growing white line', indicating the boot process. Then there's another login 'situation'. I select my avatar, I enter my password again, MacOS seems to accept it. But then after a while returns to the login screen ... so I'm stuck!? Any ideas?

Thank you!
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Datacenter platform engineer Lindows
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Hm, seems it was a weird password problem ...

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