Apple today released the fifth beta Version of its upcoming update of macOS High Sierra 10.13.4 for paid developers, one week after the release of the fourth beta of macOS 10.13.4
macOS High Sierra 10.13.4 provides support for some of the features that are also planned in iOS 11.3, such as: Messages in the iCloud that uploads all your iMessages to the cloud and keeps them in sync across all devices. It will also support Business Chat, a feature that comes when iOS 11.3 and macOS 10.13.4 are released to the public. This allows companies to offer a direct chat channel to the customer.
The new macOS update also includes the new smoke cloud wallpaper previously only available on the iMac Pro, and it warns when a 32-bit application is opened. Apple will no longer allow 32-bit applications from the next release of macOS. The same thing happened when switching from iOS 10 to iOS 11. So developers still have plenty of time to switch their applications to 64-bit. This was not a major problem for iOS 11, even though some apps that had not been maintained for a long time finally disappeared from the app store.
It is still unclear what further improvements the update of macOS High Sierra will bring but it is certain that the new version will contain bug fixes and performance enhancements for areas that were previously unresolved in macOS High Sierra.
Probably tomorrow will be the public beta 5 of macOS High Sierra 10.13.4 released.