It is running macOS Mojave 10.14.5. I am trying to install macOS Catalina beta version, either beta or developer beta. I have installed both profiles.

macOS Catalina brings a whole new set of fantastic features to your apps. Efficiently create native Mac apps from your iPad apps using Xcode. Take advantage of an expanded workspace with Sidecar. Use Core ML 3 to build realtime, personalized experiences with industry-leading, on-device machine learning and use the new Create ML app to build machine learning models right on your Mac with zero code. Create interactive augmented reality experiences with the new Reality Composer app. And much more.

Bring Your iPad App to Mac

Get a huge head start on creating a native Mac app based on your existing iPad app. Your Mac and iPad apps share the same project and source code, so any changes you make translate to both platforms. And your newly created Mac app runs natively, utilizing the same frameworks, resources, and even runtime environment as apps built just for Mac.

Sidecar

Apps on macOS Catalina automatically support an expanded workspace with iPad and Apple Pencil. Users can use iPad as a secondary display alongside Mac and draw with Apple Pencil on iPad. There’s no need to make any adjustments to your app — it just works. Apps can use Tablet Events in AppKit to enable full drawing tablet support, including pressure and tilt.

Machine Learning

With on-device model training and a gallery of curated models, there’s never been a better time to take advantage of machine learning. Core ML 3 seamlessly takes advantage of the CPU, GPU, and Neural Engine to provide maximum performance and efficiency, and lets you integrate the latest cutting-edge models into your apps. The new Create ML app lets you build, train, and deploy machine learning models with no machine learning expertise required.

AR Tools

Reality Composer is a powerful new app for iOS and Mac that makes it easy to create interactive augmented reality experiences with no prior 3D experience. Move seamlessly between your Mac, iPhone, and iPad as you build with live linking. RealityKit is a new high-level framework with photo-realistic rendering, camera effects, animations, physics, and more, built from the ground up specifically for augmented reality.

Metal

Metal gives the GPU even greater control of the pipeline, adds features that make it easier to perform advanced GPU processing, and simplifies the work you need to do to support different kinds of GPUs. New tools, including hardware-accelerated support in Simulator, help you get started faster and understand whether your app is using Metal correctly.

Just make sure there is enough space for the output DMG.Note: Besides the Quick Scan mode, you still have another chance to retrieve more files with Deep Scan mode. Now you can double click the DMG files to extract the files accordingly. Simply search for DMG to locate the desired file from all scanned files.If you are satisfied with the result, you can click the Recover button to retrieve DMG file on Mac OSX. Dmg file not opening mac.

Accessibility

macOS Catalina introduces transformative Accessibility features that help users with disabilities get the most out of their Apple devices. All-new Voice Control lets users control their Mac and iOS devices entirely with their voice. And there are many exciting updates including new zoom features, VoiceOver enhancements, and color filters.

DriverKit

The new DriverKit framework provides a fully modernized replacement for IOKit to create device drivers. Drivers built with DriverKit run in the user space, rather than as a kernel extension, for improved system security and stability.

FileProvider API

macOS Catalina introduces an all-new FileProvider API for cloud storage providers for a high-performance and powerful way to seamlessly integrate with Finder without a kernel extension for improved security. Cloud storage providers can now submit their apps to the Mac App Store.