Hi Amy.
I noticed you have posted on the forums on another thread.
Please could you reply back to my message on the below thread:
community.prometheanplanet.com/.../26284.aspx
I would recommend checking the USB cable is plugged into your MacBook Air and follow this to ensure it is plugged into your ActivBoard directly.
If you wish to contact us directly, please quote 00423373.
We will continue to support this issue on the other thread so we can fix your issue.
Many thanks.
Adam
Promethean Technical Support