Apple recently added Messages to the list of services whose data can be synced through iCloud, and most people will want to turn on this new feature right away. With Messages in iCloud—available starting in iOS 11.4 and macOS 10.13.5—your Messages conversations will act the way you probably already thought they should: the same conversations appear, in the same order, on all your devices (this includes both iMessages and SMS text messages). As a bonus, your devices will have more free space since older messages, photos, and other attachments are stored in iCloud and downloaded only when needed. For iOS devices, that also means smaller iCloud backups. Turning on Messages in iCloud is easy. In iOS, open Settings > Your Apple ID > iCloud and turn on the Messages switch. On the Mac, open Messages > Preferences > Accounts, select your iMessage account, and then select the “Enable messages in iCloud” checkbox.