> The visual bell on OS X used to be a large square popped up in the middle of
> the screen, which was easy to see. Now it is a very small warning icon, and I
> often miss it. Would it be possible to make the warning icon the same size as
> the square was, or if the icon can only be rendered at that size, provide an
> option for the old square?
The old code didn't work on El Capitan -- there were some visual artifacts left behind afterwards.
Since I didn't have access to a machine running El Capitan, I replaced the code with something that work on all OS versions.
It might be possible to increase the size -- however, the symbol is a built-in image so there is a risk that an enlarged version will be pixelated.
I'm open to other solutions to this. Unfortunately, I don't have the time to work on it myself anymore.