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Upgrade to Sierra from Yosemite

Hi, I have downloaded Sierra to my iMac (mid 2011 model) to replace Yosemite. I have launched the download but nothing has occurred?

What have I done wrong??

I have backed up via time machine to an external HD

Posted on Mar 30, 2020 3:29 PM

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Level 10

241,073 points

Posted on Mar 30, 2020 4:13 PM

Try it in Safe Mode...

Safe Boot from the HD, (holding Shift key down at startup), does the problem occur in Safe Mode?

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