3 days to import mail messages since update to 10.11.6?
Having updated to El Capitan 10.11.6, I opened Mail and was invited to import Mail Messages to the new format.
3 days later, it still hasn't finished.
I can't use Mail at all. It was working fine until the update.
What can be done to solve this?
Thanks
Tim
MacBook Pro (Retina, 13-inch, Mid 2014), OS X El Capitan (10.11.6)