You can definitely connect your Apple Mail account to Nimble via IMAP. Take the following steps to connect:
In Apple Mail, go to Preferences >> Accounts.
Copy down your email account's IMAP information to transfer it over to Nimble.
(Please note when Apple's two-step verification is on, it may block Nimble from accessing your account).
3. Once you have your IMAP credentials, log into Nimble and visit the Settings >> Email Settings page.
From here, you'll be able to connect the account via the IMAP connector. Learn more about connecting to Nimble via IMAP here.
If you have any questions, please write us at care@nimble.com, initiate a chat from this FAQ, or join one of our Nimble Onboarding and Best Practices sessions, held every weekday at 9 AM PT.