I can't set up my Google Accounts on my MacBook Pro. When adding my work (one step) or private (two-step) Google account in the internet accounts panel in system preferences, it doesn't go past this screen. When I select the apps to sync, I can click Done and then Done get's greyed out. I see the grey spinning wheel very shortly.
For the calendar, I tried this but without succes: Can't enable Gmail calendar syncing
I've had this issue on Yosemite as well, but now also for el Capitan. Other sites suggest going on a different network would solve the issue. I tried wired, WiFi and a mobile hotspot I created with my phone without succes.
It seems that in the process I'm going one step further than this guy Internet Accounts - Login Issue with Google and iCloud. I'm running out of options and frustration is growing strongly. Thinking about doing a clean install.