Looking at the FAQ’s it mentions that there may be issues recognising a T-Lock code on AppleOS as temporal dithering is enabled.
you’ve got a Mac that’s performing temporal dithering (new Macs, around 2009). Apple have come up with a new, very annoying idea, where they continuously vary the pixel values coming out of the graphics card every frame to create additional intermediate colours. This will break the T-lock code on 1/2-2/3rds of frames.
Is there a way to disable temporal dithering on AppleOS/Windows systems?