An article : Messages for Mac: Send read receipts
You can send read receipts so that people you have a conversation with know when you’ve read their messages.
You can send read receipts for all conversations you have using an account, or for just one conversation. If you turn on read receipts for an account, you can still turn them off for a single conversation—and vice versa.
Messages App Mac Not Delivered Download
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Send read receipts for one conversation
- Sep 29, 2018 Shortly after macOS 10.14 Mojave was released on Sept. 24, some users - me included - discovered that SMS messages to non-Apple devices appeared to be timing out, resulting in a 'Not Delivered.
- If not then the Apple ID is not logging in properly on the Mac. As a first Step try Logging out (Sign Out button) on the Mac version. Quit the app before relaunching the app and signing back in again. Repeat the test above. If it still does not work then use this Users Tip When the iMessages account will not Login.
- May 11, 2017 On the Mac Messages Preferences Accounts iMessages Account disable the iPhone Number as a Receive option (The Send Drop Down may now disappear if you only use these two IDs). Manually type in your iPhone Number in a New Message 'To' spot (it will not call up your My Card as you are not expected to Call yourself).
1 day ago working off the 2019 Mac Pro (latest OS), and had a few system crashes due to something with After Effects. After a few forced restarts, now Messages won't send videos. Just a little red icon with an exclamation point and 'not delivered' However I can send videos on. Oct 29, 2019 Use the Message App’s Not Delivered function to resend your texts. Turn off both WiFi and Cellular Data in the Settings app; Text the person(s) with these settings off; After repeated attempts, your Message app should show the message Not Delivered.
- Select a conversation, then click Details in the top-right corner.
- Select Send Read Receipts.
Send read receipts for all conversations
- Choose Messages > Preferences, then click Accounts.
- Select the account, then select “Send read receipts.”
And according to this article : Messages for Mac: Block or allow text messages
If you have an AOL Instant Messenger (AIM) account, you can block or allow messages from certain people. People you block can’t send you messages or see when you’re online; and you can’t see or send messages to them.
Apple Messages Not Delivered Mac
May 11, 2017 9:17 AM