Rectangular lines on my desktop

These lines have been appearing and increasing in number.

  • Are they gone when restarting your system or are they always there ? – Fabian Gr Jul 19 '18 at 6:23
  • They go when I restart. Later new lines start appearing one by one. – anju v Jul 19 '18 at 6:43

Sounds like an OSX Failure. You should try to reinstall the operating system.

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