iChat AV is an instant messaging program for Mac OS developed by Apple. It supports text communication over XMPP/Jingle or OSCAR protocols, video and audio calls, as well as screen-sharing capabilities. If you have a computer with Windows, you may use a similar utility called Microsoft Teams.

General notes

There is not a lot that can be said about iChat AV. This is a simple messaging client that does not offer many changeables settings or extra features. The installation is quite straightforward. Afterwards, you need to log in using either a Mac or AOL Instant Messenger. Please note, to run the software properly you have to open ports in your firewall.

Contacts

If you see a user on your buddy list and has audio or video support, a green camera or phone button will be displayed next to the person’s name. Due to the fact that the application is compatible with AIM, you are able to contact PC users who are connected to the aforementioned network. However, it is necessary to point out that you will not have the ability to create video conferences. Cross-platform communications are limited to exchanging text messages.

Video-conferences

In case you set up a connection with no firewalls, the program offers a stable video-conferencing experience. The video and audio quality is good, and the streams show minimal latency. You can view the other person in a large window. Within it there is a smaller one that gives you access to your own webcam view. It is also possible to move it to any corner or close it.

Features

free to download and use;
compatible with modern Mac OS versions;
you can exchange messages with other users;
it is possible to create video and audio conferences;
requires a Mac or AOL account.