According to Logitech they only exist for 10.2.8 and above. This means they haven't bothered to test these headphones on Intel Macs, which are likely to have different drivers. 10.4.4 was when Apple first had Intel Mac drivers. Rosetta, doesn't include PowerPC driver support. So you are basically stuck until Logitech can test it on Intel Macs. Contact Logitech and see if they have, or know how to make it work on Intel Macs with 10.6 or later. Just saying something is 10.2.8 or higher does not give any reason to believe it is Intel Mac compatible.