You can create groups in the Contacts app on your Mac and use them to quickly send emails to several people without needing to select each contact. Groups can be used for organization too, and can help in other apps like Messages and Calendar in some situations.
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Groups are great for creating Christmas card lists for printing address labels
How to you send a single email to more than one contact group on your iPhone?
Marjorie: Should work if you just add one group, then add the next group. Try it.
BTW: You cannot use a smart group in the To, Cc or Bcc fields. I think this stopped working after Mojave. You can click on the "+" sign and select any group. In contacts you can do a control click on a group and select 'Send Email to "group name"'. This will create a new email, adding the entries to the 'To' list of address.
I'd like to know how to reliably create groups in Texting, especially when not everybody is Apple and sometimes gets dropped out of a group conversation.
Gary: this may be more of a Messages question, but is there a way to send a message to a group in BCC mode like you can in Mail? This can be handy when you don't want to share someone else's contact with other recipients. thx
Howard: Group texts are a very different thing from what I am talking about here. You just include who you want to be in the conversation. You don't have any control other than that as SMS messages are mobile phone features, not something Apple can control
nick: BCC is for email. There is nothing like it for text messages. You can't hide where messages go with text messaging. You can probably see the problem if you think about it: you message me and 10 other people, I respond to "the group" and not I'm telling people things and I don't know who they are.