I am trying to stream content from my iMac to my Apple TV wirelessly. At present it seems to only sync with no option to stream my photos. The Apple knowledge base article TA38571 says that I should select 'sources' from Apple TVs main menu and then select 'Connect to New iTunes' to stream. On my Apple TV (software v 2.3) I do not have the option called 'Sources'. Has this option changed since the KB article was published in March 08? Can anyone please tell me how I set up my Apple TV to stream rather than sync content.