Apple has released macOS High Sierra 10.13.5 which primarily adds Messages in iCloud support, but it also includes some enterprise and security updates. You can download and install it from the Mac App Store now.
Mac backup solutions for your home or business
Having a backup of your precious personal or business data is one of those things we should do but we never get around to doing. We can help make sense of all the options and can even monitor your backups to ensure your data is safe and secure.
iCloud securely and safely stores your photos, videos, apps and more for macOS & iOS
iCloud is the name Apple gives to its range of cloud-based services, covering email, contact and calendar syncing, the location of lost devices, backups of you iPhones and iPads and the storage of photos and music in the cloud. It is also linked to all your purchases on iTunes and the App Stores.