MacBook Air's Superdrive is Restricted?

Apple is very clear on this subject. The Superdrive MacBook Air is not compatible with any other machine. We thought that this was related to a lack of power drawn from the USB ports of other Macs, and have decided to make some tests to be absolutely certain.
For this, we used a USB male-male extension cord; the second merely to collect current from a second port. Connected directly (with a single dose), the drive has been recognized as "MacBook Air Superdrive" on a Mac Pro and a MacBook Pro, but did not start. We were surprised to see that the situation remained unchanged despite using a second connector to double the power available.
To be absolutely certain, we then connected the main connector (current + data) on a MacBook Pro and the second on a MacBook Air. If the problem was related to energy, this configuration would work. However, this was not the case. Again, the DVD-writer was seen, but inoperable.
It is limited to look only for the MacBook Air.