Apple released iOS 11.4 on iPads and iPhones on May 29, including its long-awaited "News in iCloud" feature. The company did not release macOS High Sierra 10.13.5 at the same time, which limits the ability to sync messages in the cloud because 10.13.4 is not compatible with iCloud news, but Apple has released macOS 10.13.5 for three days later
Apple is not very consistent in publishing new macOS versions that match new iOS versions. Sometimes Mac updates come at the same time, sometimes a few hours later, sometimes days later. For some examples, iOS 11.0 was released six days before macOS 10.13, the updates for iOS 11.1 and macOS 1
The Biggest Feature Since September 2017, users have been waiting for AirPlay 2 messages in iCloud to save all text and iMessages to iCloud and sync between iPads, iPhones, iPod touches, and Macs. So it seems strange that Apple has waited so long for the release of macOS High Sierra 10.13.5, if users can not fully use news in iCloud without the Mac counterpart.
Strangely, Apple has an update for iTunes 12.7.5 shortly after iOS 11.4, including minor improvements in app and performance.
To make this point clear, if you only have one iOS device and one or two Macs, iCloud messages would not help you sync conversations between your devices without iOS 11.4 and Mac OS 10.13.5. This has long been a major issue when it comes to permanently deleting messages because deleting them on an iPhone does not delete them from the macOS messaging app. Even more strange, we discovered Apple's help page about this feature, which appeared as soon as iOS 11.4 was released, telling users, "Update your iPhone and iPad to the latest iOS and your Mac to the latest Mac OS." So if you're trying to sync messages between iOS and Mac OS before May 30, Apple may not follow suit. The help page was edited a day later to remove all mentions from macOS, but was reset on June 1 after the release of macOS 10.13.5.
To enable messages in iCloud on a Mac, open Messages and then click "Messages" on the menu bar, followed by "Settings." There, select the "Accounts" tab. If this option is available, the option Settings shows "Enable messages in iCloud". However, under MacOS 10.13.4, the iCloud Messages option is not displayed at all.
To make things even more confusing, macOS High Sierra 10.13.5 was finally released for everyone on June 1st. On May 30 at 1 pm ET, the Apple Developers Site released beta versions for 10.13.5 and 10.13.6, instead of immediately pushing 10.13.5 from Beta 5 to a final release, and that stayed that way for three days.  While the stable version of macOS 10.13.5 with iMessage in iCloud compatibility will be available to everyone starting at 1:00 am ET on June 1, we hope Apple will make the process smoother as soon as a big update comes out, the iOS and macOS works together for full functionality.
Editor's Note: This post has been updated to reflect mac OS 10.13.5 Release June 1.
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