How can I send personalized emails to members in a group?

If you want to send a Dear John, Dear Jane and Dear Ralph email via a group you can't.

However, if you send the email via the BBC field they will only see an email sent to them and not the entire group. The other recipients will not be listed in the To field.

The same email doesn't sound very personalized.

There is no Mail Merge capability in any current Apple products, that I know of.

Microsoft Word has a Mail Merge capability. I don't know about other word processing apps.