Re: [Jack-Devel] MacOS support

- JackRouter could be used by any CoreAudio application and also *be selected as the audio default device* in the OS X system (so to be used be applications like iTunes or Quicktime) up to OS X 10.8 (or 10.9, not sure anymore..). This « JackRouter as the default audio device » broke at that time, for several technical reasons. One is that Apple decided to progressively raise their security model (sandbox model...whatever), and second was that the JackRouter driver model become obsolete. It would have to be entirely rewritten with the new recommended CoreAudio user-land driver model. I never had time to really estimate if the new model could 1) fit with JACK server/client model and all the needs in low-level OS primitives like sockets, shared memory, process synchronization.. 2) could really solve the « JackRouter use when selected as the audio default device » issue. - I had to solve a specific issue in 10.10 (I think ?) when mach semaphore primitive could not be used anymore, and we have to switch to Posix Semaphore. After this change JACK2 continued to work up to 10.13 High Sierra, but without this « JackRouter as the audio default device » . This last development is now in JackOSX 0.92_b3.