Time Machine not working.
Have new 27" iMac running 10.10.3. Time machine will not back up hard drive. Have gone through the selecting disk but after 'preparing to backup' it fails. Using Time Capsule over WiFi.
iMac, Mac OS X (10.6.7)
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You have 90 days of complimentary telephone support, please read http://www.apple.com/support/complimentary/ and then contact AppleCare. They can help guide you through a solution.