Cannot disable "Dark menu bar" on Mac OS X

Solution 1:

I just tested the following under OS X 10.11.5 and it worked.

  • Go to System Preferences > General and check the [√] Use dark menu bar and Dock check box, then close System Preferences.

  • Copy and paste the following command line into Terminal, then press enter.

    defaults delete .GlobalPreferences AppleInterfaceStyle; killall -HUP Dock
    

After executing the above command line, the Dock momentarily disappeared and a couple seconds later the menu bar was the default color once again.