i was playing with the command key + other keys on my macbook then this black blinking square line appeared making this ticking sound as it blinks. I thought i could disable it by restarting my system but that didnt work. I honestly don't know what it is for, let alone how to disable it, so does anyone know how to disable it because its kind of annoying.
here's a screen shot. the square line appears on every active window I click.
here's a screen shot. the square line appears on every active window I click.
