I have audio pop up that start when I open a window
The computer plays these audio adverts when an internet window is open and I don't know where it is coming from
iMac, iOS 9.2
probably adware infection:
download Antimalwarebytes from https://www.malwarebytes.org/antimalware/mac/
run the scan.
This app will remove it, it is not a protection against getting it.