horizontal black lines on top menu bar

emi153 wrote:

How to fix black lines on menu bar please help me

https://discussions.apple.com/content/attachment/a934da05-1f24-4f46-a09e-2d607f377dec

I suspect you have a hardware issue.

You can Try resetting NVRAM/PRAM http://support.apple.com/kb/ht1379

To trouble shoot further you can:

— Try a SafeBoot https://support.apple.com/en-us/HT201262

Takes noticeable longer to get to the login screen, does a 5-15 minute disk repair before it fully boots up, and certain system caches get cleared and rebuilt, including dynamic loader cache, etc. Login and test. Reboot and test as caches get rebuilt.

In Safe mode third party system modifications and system accelerations are disabled, it removes malware, etc hampering smooth operation, however a reboot will put it back to normal mode.

This test will tell you if third party interference; extensions etc are not loaded in safe boot mode.

—Test issue in another user (or guest user) account  https://support.apple.com/en-us/HT204443

This will tell you if it a universal issue or isolated to your user/admin account. 

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if no insight you can try running the Diagnostic/AHT http://support.apple.com/kb/HT1509

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If it gets worse with no resolve you can

In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment

Make an appointment for a "hardware issue"—

https://www.apple.com/retail/geniusbar/

Outside the USA

https://locate.apple.com/country

From iOS device using the app to make a online Genius Bar appointment is easy:

https://itunes.apple.com/us/app/apple-support/id1130498044?mt=8

(note: due to the temporary closure of Apple Stores and the staggered reopening there may be some delays.

ref: https://www.apple.com/shop/browse/store/temporary_closures )

Apple has a "send it in" option

Call (800) MY–APPLE (800–692–7753)