My calendar app is not syncing with my gmail and has a gray triangle with exclamation point next to the gmail account in calendar. It asks me to enter the password, I do, and the password box pops back up and asks me to enter again, and then again (often 3-4 times) and then it goes away - 2 step verification is turned off, but still won't sync. If I reboot the computer, it will work for a few hours (I can add/delete calendar events to gmail calendar and they will populate in the Apple Calendar app and vice versa). But after a few hours it will lose sync again, because I'll get alert notifications of calendar events multiple times for the same event and then if my computer sleeps and when I wake it, I'll get those same alert notifications of events again (even if it was only 20-30 minutes later after I woke the computer from sleep).
Also when I go to add a google account to my calendar, the popup box asks for email and password and then disappears but doesn't add the account (even if I untick my problem gmail account).
BTW under my primary google account in Calendar it says CalDav. I've tried deleting the calendar caches in the /Library/ section, moving the calendar folder away, and basically everything to reset the calendar with no success...along with NVRAM reset and PRAM reset.
Also when I go to add a google account to my calendar, the popup box asks for email and password and then disappears but doesn't add the account (even if I untick my problem gmail account).
BTW under my primary google account in Calendar it says CalDav. I've tried deleting the calendar caches in the /Library/ section, moving the calendar folder away, and basically everything to reset the calendar with no success...along with NVRAM reset and PRAM reset.