I use Mavericks and want to change the default behaviour in Calendar when a new Event is created. In the preferences it is possible to change some of the settings. But I would like to get two default alerts and no "basso" sound (Only "Message" not "Message with sound"). I Already found that in ~/Library/Calendar/ are folders for each calendar and every calendar seems to have its own settings in its LocalDefaultAlarms folder: "EventAllDayAlarms.icsalarm" and "EventTimedAlarms.icsalarm".
But I'm not able to change these files. Or to say it more clearly, I can change them, but each time Calendar is restarted, they change back to the state before. Besides that, it is the same with the Info.plist file.
So, is it possible to prevent Calendar to update these files? Or is there a better method to change these settings?