So I have an issue that is difficult to describe, but it occurrs independently on both my computers. One is a Mac Pro, the other is a Macbook Pro. Both running Yosemite 10.10.5. When I'm watching a movie on vlc or youtube, sometimes my mouse will pop up for a few seconds even though I never touched it. And when I play a video game occasionally it will switch to my desktop (the app doesnt crash, it stays running) and I need to switch back to my app. I dont think this is a hardware problem since this is on both computers. I'm not using any bluetooth devices which could be causing this either. This issue has occured for some time now, I forget exactly how long ago I noticed it.