I did a search on this topic, but didn't find any conclusive evidence as to whether the new Macbooks (aluminum) can detect a HDTV connected via HDMI. It appears to work for some, and not for others. Other notable facts: 1. As long as the display resolution isn't above 1920 x 1200 you only need a single adapter, not the two display adapter for 30" monitors. 2. Audio does not transmit with this setup and an additional connection is required through the audio port. 3. Minidisplay to HDMI cables are in the process of being manufactured, but not yet completed. Anyway, please post your results. Thanks!