How to stop the “Moo virus”

The “Moo virus” on iPhone is usually **not a real virus** ; reports describe it as a prank or malicious Shortcut that causes zoomed screens, inverted colors, and mooing sounds. The fastest fix is to delete the suspicious shortcut, turn off Accessibility Zoom and display inversion, then restart the phone.

Quick Scoop

• Open the Shortcuts app and delete any suspicious or recently added shortcut.
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• Go to Settings > Accessibility > Zoom and turn Zoom off.
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• Go to Settings > Accessibility > Display & Text Size and turn off Smart Invert and Classic Invert.
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• If the screen is stuck zoomed in, use the three-finger double-tap gesture to zoom out.
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• Restart the iPhone after removing the shortcut.
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• If it still persists, use Reset All Settings to restore system settings without erasing your data.
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Step-by-step fix

1. Delete the shortcut. Open Shortcuts, find anything suspicious, and delete it. Reports say this is the main source of the issue.
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2. Stop the zoom. Use a three-finger double-tap, then turn off Zoom in Accessibility.
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3. Undo display changes. Disable Smart Invert and Classic Invert if they were switched on.
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4. Restart the device. A reboot helps stop any shortcut still running in the background.
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5. Reset settings if needed. Use Reset All Settings only if the problem keeps coming back.
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How to avoid it

• Do not open unknown shortcut links from messages, social media, or random downloads.
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• Review shortcut actions before running them.
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• Delete shortcuts you do not recognize or no longer use.
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• Keep iOS updated.
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Forum take

People describing this problem online consistently report the same pattern: a zoomed-in screen, odd color changes, and a cow sound, followed by relief after deleting the shortcut or resetting the settings.[2][8]

TL;DR: delete the suspicious shortcut, turn off Zoom and inversion, restart the iPhone, and reset all settings only if necessary.

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