MacOS generally uses mouse cursors we specifically made for that
platform. But in some cases, like WM_CURSOR_WAIT, the OS does not have
an equivalent and we don't have a platform-specific one. So it then
uses of of our base custom cursors. This type of cursor is always
enlarged on Mac high-DPI displays like Retina. So no need to ever
supply larger versions of this type of cursor as it will just get
huge.
Pull Request: https://projects.blender.org/blender/blender/pulls/136005
60f480f21f