Q: Web cam does not override iSight camera. Any suggestions how to do so?

If your Logitech webcam is Mac-compatible, it should be menu-selectable in the app you are using. Different camera apps work differently. Your Mac's Help in each application should give you more info on how each particular app works, but here are a few examples:

  • Messages:

  • Photo Booth:

  • FaceTime:

  • Skype:

  •   QuickTimeX:

If your camera recognizes only one camera, apps may not display even the inbuilt camera in the menu.

Different iMovie versions support different cameras in different ways.  Search your iMovie > Help for info on your version.

Outstanding reply EZ Jim

It was getting late last-night and I didn't have the energy to move the web cam from my Mini to my old iMac to generate a screenshot or two.

Again outstanding job and I Liked (1)

Thanks, dt