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Helpful answers
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Feb 22, 2015 7:31 AM in response to Mac cedoby PATRICKMELE,Do a "Safe Boot", and see if third party apps are interfering with "Desktop and Screensaver" preference issue.
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Feb 22, 2015 7:39 AM in response to Mac cedoby PATRICKMELE,If no progress try verbose mode here.Mac OS X: How to start up in single-user or verbose mode - Apple Support
and try you "System Preference" > desktop and screen saver >select background....