Just found out my now eight year old Macbook dont have airplay. It was introduced in 2011 it seems.
Anyway, I contacted Denon about this. And it seems that this indeed is their fault, as should be the obvious answer in a case like this. And they´re working on it fortunatly:
Good Morning,
Thank you for your enquiry, I apologise for the delay in this response. We have been experiencing high volumes due to the time of year.
A HEOS Control app at present does not exist for desktop computers. This is something that we have had a lot of feedback and requests for and I will certainly pass this correspondence back to our Research and Development team as another show of demand for this.
Regarding Bluetooth functionality with OSX, this is something that we are aware of and our engineers are working on a fix for this which will be included in one of the forthcoming firmware updates for HEOS. I apologise for any inconvenience caused.
Sincerely,
Denon Customer Support