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Another hint: I am running my MacBook Pro (NVIDIA discrete GPU) connected to an external display using DisplayPort. The graphic glitch only! appears when the external display is connected. Running it without the external display - no problem, regardless of the transparency. However I should check on...

same for me - it is not only related to VLC, other apps like Apple Photo ! did show this as well - transparency fix worked.

How about macOS 10.15 Catalina ?

see also

https://forum.videolan.org/viewtopic.php?f=12&t=150323&p=497868#p497868

Hello, thank you for your discussion and help / info. With regards to the nvidia Web drivers: I have had them installed, and later on removed. I also do see the graphic glitch, for me on macOS 10.14.6 the transparency reduction switch set to OFF does remove the glitch, as reported. VLC 3.0.8 However...

Cross post about these issues:

viewtopic.php?f=12&t=50663

Hi, first of all: Thank you, VLC team. Digital Life wouldn't be as comfortable as it was with VLC 0.8 branch. I am really appreciating your work done. However about the new 0.9 branch I go along with the issues mentioned above and here: http://forum.videolan.org/viewtopic.php?f=12&t=50673&p=...