Access your messages on all your Apple devices
When you use Messages in iCloud, all the messages you send, receive, and delete are updated on all your Apple devices automatically. Keeping your messages in iCloud also helps you save space on your Mac.
To use Messages in iCloud, you need macOS 10.13.5 or later, iOS 11.4 or later, or iPadOS 13 or later. You also need to be signed in to iMessage using the same Apple ID on every device where you want to use Messages in iCloud.
Turn on Messages in iCloud
On your Mac, choose Apple menu
Sign in: Click Sign In, then sign in with your Apple ID. Use the same Apple ID you use to sign in to Messages.
Verify your Apple ID: Click Apple ID
, then make sure you’re signed in to iCloud with the same Apple ID you use to sign in to Messages.
Click Password & Security in the sidebar, then make sure that two-factor authentication is turned on. See Set up your Apple ID password and security information.
In the Messages app
on your Mac, choose Messages > Preferences, then click iMessage.In the Settings pane, select Enable Messages in iCloud.
The messages from your other devices that use the same Apple ID appear on your Mac.
Note: Depending on how many messages you have, it may take a while for all of them to appear. You can send and receive messages during that time.
To make sure you’re seeing the latest messages in iCloud on your Mac, choose Messages > Preferences, click iMessage, then click Sync Now in the Settings pane.
Turn off Messages in iCloud
You can turn off Messages in iCloud on all your devices or on your Mac only.
In the Messages app
on your Mac, choose Messages > Preferences, then click iMessage.In the Settings pane, deselect Enable Messages in iCloud.
Choose one of the following:
Disable All: Turns off Messages in iCloud on all your devices. Messages are no longer stored in iCloud and are instead stored on each device.
Disable This Device: Turns off Messages in iCloud on your Mac only. Messages on your Mac are no longer stored in iCloud; on any other device where Messages in iCloud is turned on, messages continue to be stored in iCloud.