Facetime not letting me sign in - hanging on login screen
I have been trying - and failing - to sign into Facetime on my Mac.
The login screen appears, with my Apple ID entered, but when I type my password nothing further happens. Even more curious is that when I typed the wrong password deliberately, it recognised it as incorrect. When I type the correct password, however, the progress wheel spins but ultimately to no avail.
I've tried all the usual steps, switching off and back on, resetting PRAM and signing out of my Apple account on settings, but no luck yet. My Apple ID is verified and has been in use for years now, so that shouldn't be a problem.
OS: 10.9.5
Hardware: MacBook Pro Retina 15" (Early 2013) 2.7Ghz i7
Any advice on this would be much appreciated, thanks.