Odd black lines surrounding finder

Discussion in 'Mac Basics and Help' started by NerdsWithSwords, Apr 16, 2013.

  1. NerdsWithSwords macrumors newbie

    Apr 16, 2013
    For some reason my computer lagged for a few seconds when changing windows and these black lines surrounded my finder. It doesn't show up around any other window, just the finder. I've tried relaunching it, but it didn't change.


    Any help is much appreciated!
  2. RedCroissant Suspended

    Aug 13, 2011
    Did you only try relaunching it, or did you also try shutting down and then restarting the machine?

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