Sonoma freezes / crashes when playbacking videos in Quicktime

The problem exists regardless of which monitor or TV you have connected.

The problem exists on MacBooks without external monitors as well as on MacStudios with connected monitors from Eizo or other manufacturers.

What I hate is that we cannot even go back to previous OS because Sonoma has so many bugs if you try to make a boot disc of off Ventura through terminal you can’t because terminal claims it cannot find stuff inside the Ventura in order to make the bootable disc, is a total disaster.

I'm plagued by a similar problem.

No matter what a video format I'm watching with QuickTime oder VLC, as soon as I use my external monitor the system freezes after a few seconds.

With the notebook screen only I have no problems and I can watch videos for many hours.

Yes I sent feedback on this to several channels on the feedback page (macOS, QuickTime, Keynote). The iWorks/Keynote group got back to me with instructions on installing some logging software while I recreated the bug, which I did, and sent a few days ago. I'm still waiting to hear back.

Use gom player if vlc freezes your machine. i found from the vlc forum. gom player is working fine for mkv files. same way it freezes when i play youtube in chrome too. only hard reset works.

https://forum.videolan.org/viewtopic.php?f=12&p=541088

It's necessary to try this with an EXTERNAL monitor, plugged with an addaptator (Apple official - "USB-C Digital AV Multiport Adapter") for example !

Please send our a good news (I hope !)

I can'n imagine it's not resolve…

So I have USB-C to displayport for my main monitor. 1440p, 120hz (144hz doesn't work! but that's another problem which remains in 14.2).. then I have a 4K samsung Tv connected via USB-C to HDMI adapter. TV is off. Will try it directly connected to HDMI.. then edit comment.

So I have USB-C to displayport for my main monitor. 1440p, 120hz (144hz doesn't work! but that's another problem which remains in 14.2).. then I have a 4K samsung Tv connected via USB-C to HDMI adapter. TV is off. Will try it directly connected to HDMI.. then edit comment.

edit:

Yep, you are right. problem is still there! Before my early comment, I played videos in VLC and Quicktime for 30-40 minutes. Switching between them and Safari.. on and off focus, no lock-ups at all, worked fine. Tried different file types and players. ....Switching to HDMI, it froze almost immediately. Switching back to USB-C adapter, it took a little while longer, however, still crashed. I tried switching while videos were playing and that locked up immediately and didn't come back after disconnecting the second display. After logging back in, the problem remains as before with the typc-c adapter. Perhaps are a fresh boot, with no changes to displays, it doesn't do it... might be why the bug has been overlooked in testing.

This bug's been really frustrating and going on for 1+ month now. It's been so bad as to actually freeze my mbp during client meetings where i'm forced to reboot and log back into the meeting...not very professional...please apple this is embarrassing me in front of my clients. QuickTime is the problem and we need a fix asap!

(m1 max,64gb ram on sonoma 14.2.1)

I prefer and expect Apple to fix QuickTime instead of relying on vulnerable 3rd party apps for this reason: https://portswigger.net/daily-swig/macbook-proton-data-thieving-trojan-hits-elmedia-video-player#:~:text=According%20to%20research%20published%20by,with%20the%20OSX%2FProton%20malware.

I have had problems with several video players incl VCL & Quicktime.

Got a tips from ICANHEARUNOW here on Apple community that Elmedia Video Player works with Sonoma on Mac.

Efter downloading Elmedia (free version) and have used it for over a month without any problems.

Kerri

https://www.elmedia-video-player.com/

Same here. MacBook Air 2020, UBS-C dock with HDMI, HDMI cable connected to Dell full HD 27" as second screen (mirrored). Playing MP4 freezes the whole thing, only option is to hard reset.

I've set VLC as the default for MP4's which works fine but this issue is a PITA....can't believe it's not been fixed yet.

Same problem here. Quicktime player with screen mirroring via HDMI on external monitor. 2021 16-inch MacBook Pro with M1 Max running Sonoma 14.3.1.

Video freezes at first but audio keeps playing. Then machine crashes/restarts after about 20 seconds. I unplugged the monitor and it was able to play the same movie files without issue.

Same thing to me, since I installed it i had several issues with video applications. First, when i plugged in an external monitor or projector the screen freezes, i keep hearing the sound and after that the mac restarts. As I have 2 macs (one air and the other macbook pro, with m1) I downgraded to Ventura in one of them and worked nicely. I´m giving a second chance in the other one but the issues persists, so today I will downgrade in the other one. Last time that I update the OS whenever it is released.

Appears that for screen recording purposes (as well all other QuickTime-related functions) we should be turning to third-party software. VLC Player works great for playing back, but it doesn't do screen recording...