Laura, Chatting between Macs and Windows is still evolving, especially if you want to use the voice or video conferencing features. iChat AV is the best program out there, but it is Mac-only. If your friend is using MSN Messenger, you will have to use the Mac version of MSN Messenger to chat with them. There are some clones that also work, but iChat AV will not work. Also, you will not be able to do audio or video conferencing, just typing back and forth. Tom ----- Original Message ----- From: "Laura Bruce" <labruce at gmail.com> My new problem is a very basic one. Someone on MSN wants to chat with me via IM. I have a mac.com account. Can I chat with them using iChat, or do I need to download that &$&*£^@£% MSN software? Have never used iChat before so am completely lost. I have set the recipient's service to MSN in the address book section, but still no luck.