For example, you may have a Mac Pro with speakers plugged into the line-out, as well as headphones jacked into the port on the front of the tower. Switching sound output devices in Mac OS X is pretty easy. Move to the âOutputâ tab and select your desired output device. Here, âLine Outâ is for my speakers and the Built-in Output (Headphones) is for none other than my headphones. Once you have clicked on the desired output device, close the window.
But the same study found that the United States had 133 mass shootings. Finland had only two, which killed 18 people, and Switzerland had one, which killed 14. In short, isolated incidents. So while mass shootings can happen anywhere, they are only a matter of routine in the United States.
The deadliest mass shooting in U.S. history was shocking in its scale â but it wasn't a surprise that it was committed by a white male. Statistics show that since 1982, the majority of mass shootings â 54 percent â were committed by white men, according to data from Mother Jones. Black people were the second largest perpetrators of mass shootings based on ethnic background, but only accounted for roughly 16 percent of the total incidents during the same time period.