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Level 2

344 points

QuickTime 10.4 (Sierra) won't autoplay movies.

For the life of me I cannot remember if this has started with the installation of Sierra, or right after, or right before. I don't think it's Sierra at all, I think at some point in the past few days I've done something somewhere that's changed/affected QuickTime's behaviour.

Now when I open whichever video file in QuickTime, it doesn't automatically play, I need to hit the play button manually. Movies have always autoplayed ever since I can remember, and I definitely don't like this issue. I've already tried the following command in Terminal...several times...didn't work.

defaults write com.apple.QuickTimePlayerX MGPlayMovieOnOpen 1

MacBook Pro, macOS Sierra (10.12), 17'' Late 2011

Posted on Sep 25, 2016 7:35 PM

20 replies

Dec 29, 2016 3:38 PM in response to Jon Walker

I tried VLC. The only thing is that I am not able to play more than one video at a time for some reason.

Have you tried any others? I'm interested.

Jon Walker

Level 6

19,467 points

Dec 29, 2016 3:43 PM in response to applewarm

All I've found on Google and also Youtube (lots of videos) is pretty old stuff, before Sierra. So I guess it's not a new issue at all, people have had it before.

If you are referring to player app playback, then the QT X issue is not new. If you are referring to the automatic playback of online internet content, then it's up to the website programmer and/or video encoding person whether or not a file plays back automatically in a web browser.

So I guess it's not a new issue at all, people have had it before. Not me though, so in my case as said I don't know if I did something myself or if it's Sierra.

Again, this is a player issue—not a MacOS issue.

Anyhow, a solution would be very nice since that Terminal command does not work for me. And that seems to be the only solution available, or at least that I've found myself.

Again, you can use a different media player. You can also ask Apple to add the option as a QT X "preference" setting as with QT 7 but it seems unlikely to happen since Apple appears to be moving away from media player preference options.