I use gmail through the web interface, but have Apple Calendar synchronising with google's calendar. I don't want to use Apple Mail for anything at all. Every time the calendar synchronises with Google, Apple Mail opens and asks me to set up an account. How do I stop Apple Mail from doing this?
I have Mac OS 10.8.3. In System Preferences, under Mail, Contacts & Calendars, I have my Google account specified, but with "Calendars & Reminders" checked and the remaining options (Mail, Messages and Notes) unchecked.
EDIT: after some poking around, it seems the problem is that Calendar wants to open Apple Mail to send me reminders about my events. Can I stop it from doing that?