Hi. How free antivirusnika to check the Mac? Lately some strange glitches. For example, open your browser, and sometimes he switches and opens the other program is inactive, for example audio player. Rather not. Both apps running but the browser is open, then the computer can switch to another active program. Generally something wrong :)
Dr. Web. On their website there is a special tool to check OSX
sheldon_Schuppe answered on July 8th 19 at 16:07
Try to change the keyboard.
Or go by another user: if the glitch disappears - the problem is caused by a virus, you have personally installed the system. Then only a complete reinstallation of the system, manually copy the "favorite cats", but not installed "apps"
Perhaps you have enabled VNC and a user without a password - can young Chinese hackers to have fun
My 100 users for 10 years have not had any problems with viruses on MacOS