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QuickTime player not opening

I have a MacBook Air with macOS Mojave installed. I was using QuickTime till 2 days ago. Now I find it is not working. The icon is there in the dock but it does not open. Once I got an error message like (-101)

Kindly help

Regards

Prashant

MacBook Air, macOS Mojave (10.14.1), Serial No C0***085

Posted on Nov 12, 2018 1:30 AM

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The outcome of these tests should tell how to proceed next.

Posted on Nov 13, 2018 2:03 AM

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Nov 13, 2018 5:03 AM in response to prashant001

Safe Mode is a special way of starting up that may help pinpoint where your issue with Quicktime Player lies, as something specific to your situation is causing this issue. It will be important to know if the issue can be replicated in Safe Mode, or not. After this test, you should start up in regular mode again. Let us know how it went.

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Question marked as Helpful

Nov 13, 2018 5:03 AM in response to prashant001

Safe Mode is a special way of starting up that may help pinpoint where your issue with Quicktime Player lies, as something specific to your situation is causing this issue. It will be important to know if the issue can be replicated in Safe Mode, or not. After this test, you should start up in regular mode again. Let us know how it went.

Nov 15, 2018 1:05 AM in response to prashant001

“It will be important to know if the issue can be replicated in Safe Mode, or not.”

Please trying opening QuickTime Player while in Safe Mode. Try playing one or more known-to-work video files. Does it behave any different in Safe Mode?


If your Mac has an issue that goes away when you start up in safe mode, you might be able to isolate the cause this way.


If your Mac has an issue that doesn’t go away when you start up in safe mode, then the cause is probably unrelated to (1) startup disk functional integrity, (2) optional/3rd party kernel extensions, (3) startup items, (4) user-installed fonts, (5) caches. Instead, focus on other causes.

If your Mac has an issue that doesn’t go away when you start up in safe mode, then we have to investigate further. Only then test this issue in another user account on your Mac.

Nov 17, 2018 6:23 AM in response to prashant001

So … QuickTime Player can be used to open media files after all.

It appears that the icon in the Dock is unresponsive, if I understand you correctly.


Try opening QuickTimePlayer from the /Applications folder. Does that work better? If so, then you could remove the old Dock icon (drag out of the Dock, hold until the tool tip ‘Remove’ appears, then let go) and drag a new link to it (drag the program icon form the /Applications folder to the same position in the Dock as where the previous icon was).

Nov 17, 2018 7:00 AM in response to Urquhart1244

Thanks for your reply.

Your observation is correct. The QuickTime Player icon in the doc is unresponsive. I can play a video file by double clicking it. I have removed the icon from the doc and dragged the icon from the Application folder to the doc. But that still remains unresponsive. If I duble click the icon in Application folder or in Launcher, the application does not open

Regards

Prashant

Nov 17, 2018 7:22 AM in response to prashant001

If the application won’t launch from the /Applications folder either, then the issue is not with the Dock, but application specific.


If the application tries to load/process old content from a previous session, and fails, then it could try that again at each launch and again get stuck.

Delete the folder at
Macintosh HD/Users/<username>/Library/Containers/com.apple.QuickTimePlayerX/Data/Library/ Saved Application State/com.apple.QuickTimePlayerX.savedState

Nothing essential is in there; it is for recovering from an interruption. If you delete it, the folder will be re-created with new data.

QuickTime player not opening

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