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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Dec 22, 2015 8:02 AM in response to rcalderaby OGELTHORPE,You should pose this query top the technical staff of the communications provider. It may be that they do not have compatibility with El Capitan or some new software may be required. This is not an Apple issue.
Ciao.