Well, I am not a Mac user, but from the message, I'd say that you're trying to install HA but you don't have the sufficient rights (e.g. administrator in Windows, super user/sudo in Linux). With a right click (or Command+click) on the installation icon, you may have a popup menu offering you to run the program with the admnistrator's rights (after entering the correct password).
offline
Harmony Assistant - Ubuntu + Wine et Windows XP sur machine virtuelle. VS, OMeR, PDF2M