Remove Rounded Corners from QuickTime Player Video Windows

Jun 25, 2012 - 6 Comments

Remove rounded corners from QuickTime video windows

QuickTime Player automatically rounds the corners of any video window, a nice touch that fits in line with the rest of the OS X desktop and window experience. If you don’t like the rounded movie window appearance though, you can easily disable them:

  1. Quick QuickTime
  2. Launch Terminal and enter the following command:
  3. defaults write MGCinematicWindowDebugForceNoRoundedCorners 1

  4. Relaunch QuickTime and open a movie to see the difference

The change is obviously very subtle, but if you watch a lot of windowed movies it can be an attractive change.

If you want to get the rounded corners back, use the following defaults write command and then relaunch QuickTime Player:

defaults write MGCinematicWindowDebugForceNoRoundedCorners 0

The defaults command works in practically all versions of QuickTime in Mac OS X including OS X Lion and Mountain Lion. We had covered this a while back as part of a group of QuickTime hacks but thanks to David for the reminder that it works in new versions too.


Related articles:

Posted by: Paul Horowitz in Mac OS, Tips & Tricks


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  1. Mike says:

    Removed rounded corners and screen recording stopped working. Drop down menu inaccessible, no button functionality, etc. Restored rounded corners, screen recording works again. Totally weird? (MacBook Pro 6,2).

  2. Mark says:

    yep same thing happened to me. sad, because i don’t like the rounded corners at all :(

  3. Christian says:

    Yeah, this break Quicktime…

  4. Bantoz says:

    Doest seem to work for me…

  5. Ryen says:

    I am having the same problem. I am unable to move the movie window or use any of the title bar buttons

  6. Tak says:

    Is there anyone else having problem with closing movie window by hitting red button on left top corner? My movie window will just go behind Safari window for example and won’t close and if you have not any window below Quicktime window, it just stays there even I hit red close button multiple times…

    Maybe Qucktime will break after removing those round corners…

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