my mac has 3 horizontal lines across top of screen, it popped up when opening safari then disappeared when i close the app. Only for it to stay after reopening the safari app, the lines are not going away! help
MacBook Pro 13”, macOS 10.15
Go step by step and test.
Use safe mode to try to isolate the cause of the issue.
Once in Safe Mode, click the “Restart” button at the bottom of the screen to exit Safe Mode.
Test.
Reset PRAM: Reset NVRAM or PRAM on your Mac - Apple Support
Reset SMC: How to reset the SMC of your Mac - Apple Support Choose the appropriate method.
Contact Apple Support: https://support.apple.com/contact
Went through all these options and the lines are still here only now, they are flickering!
Thanks for tips.
horizontal line on mac screen
