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Video inclined in fullscreen

I have a problem with my MacBook Air (11-inch, Early 2015) since macOS 10.13.4 update. When playing a video in fullscreen, it shows inclined, like two pieces side by side. It happens in iTunes (not in QuickTime X) and Safari. There's no problem when an object overlays the video, like scrolling tool at the bottom, subtitles or system sound level. In YouTube in Safari, the same thing happen. Videos play correctly when an icon appears in the right corner or options at the bottom. The same videos play well in Chrome and Firefox (maybe Chrome and Firefox don't use h.264 videos).

User uploaded file

This is a picture of my screen. I added a red line where the video is cut in half. Is it a known issue?

MacBook Air, macOS High Sierra (10.13.4), null

Posted on Apr 17, 2018 5:07 PM

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Posted on Jul 27, 2018 8:13 PM

Same problem here on MacBook Air 11'' running High Sierra 10.13.6.


Workaround for me was to change display resolution to 1280x720.

Fullscreen video (iTunes/Netflix/Youtube) back to normal after change.


Hope it works for others.

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Video inclined in fullscreen

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