El Capitan won't install due to Time Machine interference.

El Capitan (and Yosemite) download fine. But neither would install. After I start the installation and click the hard drive icon, I get a message that says "Time Machine uses this drive for backups" then everything stops. iMac with Mountain Lion. Grrrrr.

Posted on Feb 3, 2016 3:54 PM

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El Capitan won't install due to Time Machine interference.

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