QuickTime 10.4 (Sierra) won't autoplay movies.

I think it's bugged in the plist file for quicktime 10,4 on mac os high sierra autoplay is enabled. i don't understand whats happening here. every change i make to the plist doesn't make any difference whatsoever. What i think is: apple changed so much security settings , that these things are broken.

I just updated to os Sierra and I have experienced this failure to autoplay as well. The available command in terminal has no effect on QuickTime X autoplay in Sierra. I was using my mouse to point to the video and then play. However, I discovered if you just hit the spacebar the video will play. Not actually a work around but works well enough for me.

It's beyond me how my Mac laptop, powerful processor, has a native application like quicktime that does not open media automatically. I understand that apple basis its intuitiveness on simplicity, - and that is an effective selling point, but to add an additional step in the viewing of videos doesn't seem very apple-like.

I tried, it didn't work. I really don't understand why this isn't a standard preference option.

# Auto-play videos when opened with QuickTime Player
defaults write com.apple.QuickTimePlayerX MGPlayMovieOnOpen -bool true

op

I'm pretty sure it is a Sierra issue... I'm seeing the same thing after upgrading, and searching Google comes up with someone else saying the same thing about the beta back in July

There is no solution.

Quicktime does not autoplay movies in OSX 10.12

Attn Apple - This is the lamest software "upgrade" ever. To disable a feature that makes your product more user friendly is something I'd expect from Micro$oft, not Apple. Steve Jobs not once said lets force the user to make more clicks just because we can.

Attention, Apple. When you disable something that many people enjoy using, it leaves users with a bad taste in their mouth. If enough of these bad experiences pile up, people start searching for an alternative. That means lost good will, which translates into lost revenue for Apple. This is true no matter why this happened. All we see is that we used to be able to autoplay files when we opened them in Quicktime, and after the upgrade we cannot. So it is obvious that updating to Sierra caused the issue.

Just make it so that the above command works in Sierra. This feature is built in to Windows, and it seems making it available would be common sense. If for some reason some of your users don't want to autoplay files in Quicktime, just give them the option to toggle autoplay off.

Just fix it. Then I can go back to saying that my MacBook "just works" because now it doesn't. Not the way I want it to work.

It's a fact that it takes 5 positive events to cover for a negative event. So get working on this, Apple.

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.

The answer actually depends on when you switched from the QT 7 or VLC (or any similar) player to the QT X player for playback. Autoplay is a function of the player app/embedded QT structure—not the operating system. For instance, files have a built-in setting that will allow them to play automatically upon opening if the player uses it. (E.g., QT X ignores this setting but QT 7 uses it.) In addition, the QT 7 player includes a preference setting that will automatically play any media file upon opening whether the file is set to play automatically or not. VLC also normally plays any file opened by the app or which is dropped to the "Playlist" window.

I'm not a programmer, but I can try different things hoping they'll work. Here is what I've tried. Please let me know anything that you've tried. Maybe we can find something that works by process of elimination.

defaults write com.apple.QuickTimePlayerX MGPlayMovieOnOpen 1

defaults write com.apple.QuickTimePlayer MGPlayMovieOnOpen 1

defaults write com.apple.QuickTimePlayerX PlayMovieOnOpen 1

defaults write com.apple.QuickTimePlayer PlayMovieOnOpen 1

defaults write com.apple.QuickTime Player PlayMovieOnOpen 1

That gives me this message:

Unexpected argument 1; leaving defaults unchanged.

Good luck, everybody. I ended up installing an alternate video player (VLC). Of course, that one will only play one video at a time.

The only reason I used QuickTime was to watch multiple videos at once. I guess there's no perfect solution at this point. 😠