Go to Settings>General>Date & Time and turn off set time and date automatically.  


On the upper tool bar next to the apple menu:


Go/Computer/Macintosh HD


press command + shift + "."[period] in the Macintosh HD folder to show hidden folders.


Click var>db look for timed folder. To unlock timed folder right click on it to Get info, unlock at the bottom right to make changes, then change Privilege for everyone to Read & Write.


In timed folder delete "com.apple.timed.plist" file. 


Restart your computer and turn auto time back on.