Batch Delete in iMessages?

Had you tried to Delete a Conversation, rather than a Message?

Delete a conversation:

1. Control-click a conversation to open a shortcut menu.
2. Choose Delete Conversation.
3. Click Delete.

{..above from: use messages with your mac - apple support..}

Supposed to be permanent. However if you've more than one

device that could share the message, those may retain it awhile.

The iCloud setting(s) in your account, may affect other choices.

Since I have an iPhone, an ancient iPad Mini1.1 (wi-fi) & Mac mini

intel-based quad i7, with three macOS installed, these vary. None

of them are most recent OS; iPhone iOS is more recent of these.

Seems to me there may be a means, to remove Conversations..

But if you go too far, there may be a need to go to Contacts and

re-add those names, if deleted in 'overzealous removal' process.

Duplicate 'Contacts' may be helpful, should removal go too far;

in order to restore them, after they go missing(?)

Good luck & happy trails!

⛵️🎣🌞🌿🌤⛄️📬

Depending on what options you may have tried, there are a few

that could remove the messages and attachments from iCloud;

however any other devices with those, could re-populate again.

• Use Messages in iCloud - Apple Support

https://support.apple.com/en-us/HT208532

This could in effect be similar to batch removal, if it works OK.

May be fine if you had backups of a few messages, elsewhere.

Learn more about the Continuity features for your Apple devices

Could help to see how the features are shared, to disable them?

You could try & maybe use Siri to remove messages ~ in mass?

This may involve tedium, reading secondary links to find details.

• How to use Siri on your Mac - Apple Support

https://support.apple.com/en-us/HT206993

There are a few good clues, where I found some earlier info;

in Search results, such as this duckduckgo shows:

https://duckduckgo.com/?t=ffab&q=delete+conversions+in+messages+macOS&ia=web

When I first saw this discussion a few days(?) ago, suggestion

to use Command-Line & go into system to remove Messages.

Seemed too extreme. [And chancy. ~ Did not try any.]

Most results suggest you cannot batch remove your messages, instead you

have to select each conversation as I'd previously suggested, in early reply.

Some ideas here, have been depreciated in later macOS versions:

https://apple.stackexchange.com/questions/324452/how-to-delete-all-

conversations-all-at-once-in-imessage

You may have better luck in using iPhone to deal with messages.

Last added (May '20) in above suggested user found iPhone means.

https://apple.stackexchange.com/a/390142

Good luck & happy computing!

🌞🌿⛵️🎣🌻🐢⛄️🌤🚀🌎

PS: • How to Delete All iMessages from Mac or MacBook | tech

https://www.techjunkie.com/delete-all-imessages-from-mac/

Several ideas appear among those duckduckgo search results.

Good luck & happy trails!

🌞🌿⛵️🎣🌻🐢⛄️🌤🌎