Macbook Pro running Sonoma 14.2.1 (23C71) freezing when external monitor is connected when Quicktime file is launched

Whenever I connect my LG external monitor to my Macbook Pro running Sonoma 14.2.1 (23C71) and launch a Quicktime file, the machine freezes and eventually restarts. Most times I lose my work. I'm a video editor using Adobe prodcuts most times twhen this happens.



MacBook Pro, OS X 10.11

Posted on Mar 8, 2024 7:47 AM

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Question marked as Top-ranking reply

Posted on Mar 8, 2024 10:09 AM

Try this:


Settings > Desktop and Dock > Click wallpaper to reveal desktop: "Only in stage manager"

Settings > Desktop and Dock > Stage Manager: OFF


macOS Sonoma crashes when using QuickTime… - Apple Community


Quit Quicktime Player, and try if moving these folders to the Desktop folder (just in case before deleting them) helps:


~/Library/Containers/QuickTime Player

~/Library/Containers/com.apple.QuickTimePlayerX/Data


If not, try to make a dummy user and see if Quicktime Player works in that account.


IINA is a good simple player for the codecs and wrappers that QuickTime Player does not support (H.265 with Codec ID hev1, Chroma subsampling 4:2:2 (Bit depth 10 bits) in Mojave, VP8, VP9, Opus audio (now works in Sonoma), Vorbis audio, .avi, .mkv, .webm).


https://iina.io


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Question marked as Top-ranking reply

Mar 8, 2024 10:09 AM in response to AVGRPHX

Try this:


Settings > Desktop and Dock > Click wallpaper to reveal desktop: "Only in stage manager"

Settings > Desktop and Dock > Stage Manager: OFF


macOS Sonoma crashes when using QuickTime… - Apple Community


Quit Quicktime Player, and try if moving these folders to the Desktop folder (just in case before deleting them) helps:


~/Library/Containers/QuickTime Player

~/Library/Containers/com.apple.QuickTimePlayerX/Data


If not, try to make a dummy user and see if Quicktime Player works in that account.


IINA is a good simple player for the codecs and wrappers that QuickTime Player does not support (H.265 with Codec ID hev1, Chroma subsampling 4:2:2 (Bit depth 10 bits) in Mojave, VP8, VP9, Opus audio (now works in Sonoma), Vorbis audio, .avi, .mkv, .webm).


https://iina.io


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Macbook Pro running Sonoma 14.2.1 (23C71) freezing when external monitor is connected when Quicktime file is launched

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