diagnosticdaemon: disable for macOs for robotology#439

CMakeLists.txt

@@ -195,7 +195,7 @@ endif()
 if(ROBOTOLOGY_ENABLE_ICUB_HEAD)
   find_or_build_package(icub_firmware_shared)
   find_or_build_package(ICUB)
-  if(ROBOTOLOGY_PROJECT_TAGS STREQUAL "Unstable")
+  if((ROBOTOLOGY_PROJECT_TAGS STREQUAL "Unstable") AND (NOT APPLE))
     find_or_build_package(diagnosticdaemon)
   endif()
   if((NOT WIN32) AND (NOT APPLE))

README.md

@@ -430,7 +430,7 @@ On Linux all the software necessary to communicate with boards contained in the
 
 On Windows to communicate with CAN devices via [esd's CAN USB bridges](https://esd.eu/en/products/can-usb2) you need to set to ON the Windows-only CMake option [`ROBOTOLOGY_ENABLE_ESDCAN`](#esdcan).
 
-On macOS, communication with [esd's CAN USB bridges](https://esd.eu/en/products/can-usb2) is not supported.
+On macOS, communication with [esd's CAN USB bridges](https://esd.eu/en/products/can-usb2) is not supported and `diagnosticdaemon` is not available because of https://github.com/robotology/robotology-superbuild/issues/439.
 
 This section documents the iCub Head profile as any other profile, in a way agnostic of the specific machine in which it is installed. To get information on how to use the robotology-superbuild to install software on the machine mounted in the head of physical iCub robots, please check the documentation in [`doc/use-on-icub-head.md`](doc/use-on-icub-head.md).