Since upgrading to Mavericks, the Calendar app will pester me for my gmail password every half hour or so, even though it already has the correct password stored.
I've tried changing the password, setting up 2-step verification and creating an app-specific password, changing the app-specific password... I even tried deleting all of the relevant passwords from the Keychain Access app and then entering a new app-specific password into Calendar, and still Calendar continually pesters me to re-enter the password.
I'd blame google, but since Calendar (and specifically Mavericks Calendar) is the only app that has trouble with the Google calendar, that says that the problem is on Apple's side. Has anyone experiencing similar problems found a workaround?