Mail.app goes unresponsive whenever a specific Gmail account is added.
If I quit the process and go to
System Preferences > Internet Accounts and disable the account, I can start Mail normally.
I can then use my other accounts (Exchange and Gmail) normally. If I then go to
Preferences and enable the offending Gmail account, new emails are downloaded and then mail goes unresponsive.
I have tried removing and recreating the internet account, the mailbox, etc. I can verify that Mail downloads 1.5GB of data (approximately the size of the Gmail account) whenever I recreate the account. It remains unresponsive whenever the account is active.
I have tried the solution laid out here. It worked the first time this happened and now did not resolve the issue.
Can anyone think of any other steps to take to reset mail and get this issue fixed? Does anyone know the source of the bug?