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Question: A white box reappears and stays stuck on my MacBook Pro screen

I'm running macOS High Sierra 10.13.3 on a MacBook Pro Retina 13-inch. The white box below appears and even a restart can't get it to go away. What can I do? It's on the MacBook itself. The two external monitors I run stay clear and fine.

User uploaded file

MacBook Pro with Retina display, macOS High Sierra (10.13.3), null

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I thank you for alerting me this is a notification box. I get more frequent notifications from Slack -- and in about that position--than Sametime. So I will go to Slack support. Appreciate your sleuthing abilities.

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Mar 2, 2018 2:41 PM in response to alanfromburlingame In response to alanfromburlingame

It looks like a blank Notification. Try turning on "Do not Disturb" in System Preferences > Notifications and see if it disappears.

If that doesn't work try deleting the Notifications plist:

From your Finder "Go" menu > "Go to folder" and enter

~/Library/Preferences/com.apple.notificationcenter.ui.plist

Press Go.

Delete the plist file.

Mar 2, 2018 2:41 PM

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Mar 8, 2018 5:02 PM in response to macjack In response to macjack

Thank you for your fast response, macjack. Just today the box came back and I got to check these steps, and unfortunately neither worked. "Go to folder" did work when I took out the period between "center.ui" in this command: ~/Library/Preferences/com.apple.notificationcenter.ui.plist

I moved the .plist folder to trash

I emptied the trash

The box is still there.

Back on March 2, when I wrote the post above, the blank notification box disappeared when I opened another app, Sametime.

Opening Sametime today and the blank notification box doesn't disappear.User uploaded file

Mar 8, 2018 5:02 PM

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Mar 10, 2018 2:06 PM in response to macjack In response to macjack

I thank you for alerting me this is a notification box. I get more frequent notifications from Slack -- and in about that position--than Sametime. So I will go to Slack support. Appreciate your sleuthing abilities.

Mar 10, 2018 2:06 PM

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Question: A white box reappears and stays stuck on my MacBook Pro screen