First of all I must say that the BookArc Desktop Stand is a very brilliant and high-quality processed product ... but unfortunately not compatible with the current generation of MacBook Air! The stand will be 3 different missions, but none for the Macbook Air (also not for the old). According to the manual / description of TwelveSouth can request an additional use for the Air. So an email to the support ... after a few minutes the answer: ". This device will never be compatible with the newest Air"
However, there will be a new BookArc stand in the foreseeable future, according to support from Twelve South, which will be built specifically for the new Airs 11 "and 13".
Stand goes back and I have no doubt something to be patient until the new available is ...;)