HT201475: Upgrade to OS X El Capitan
Learn about Upgrade to OS X El Capitan
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Helpful answers
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Aug 6, 2016 8:39 AM in response to dietrichfromfort lauderdaleby Oliver.James,Hello,
Sorry to hear your having trouble upgrading. What exactly is stopping you from upgrading? e.g. error messages
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by macjack,Aug 6, 2016 8:41 AM in response to dietrichfromfort lauderdale
macjack
Aug 6, 2016 8:41 AM
in response to dietrichfromfort lauderdale
Level 9 (55,682 points)
Mac OS XHi Dietrich, it's difficult to know what you've tried already and exactly in the process the proplem.
That said, I'd suggest using the 10.11.6 Combo Update to overwrite any system software that is corrupt.
The Combo Update is a fuller install, as opposed to an incremental "delta" update, so it should overwrite any files that are damaged or missing. It does not matter if you have applied it before. It should preserve all your data and settings, but that said you should always have a backup.