Create even more powerful Mac versions of your iPad apps. Apps built with Mac Catalyst now take on the new look of macOS Big Sur and help you better define the look and behavior of your apps. You can choose to turn off automatic scaling of iPad controls and layout, allowing you to precisely place every pixel on the screen. Catalina on (3) Late 2009 Mac mini’s, buttery smoothly. Catalina on (1) Late 2009 iMac, buttery smoothly. Catalina on (1) 2011 MacBook Air 13″, buttery smoothly. Only 4GB’s but works buttery smoothly. Catalina on (1) 2008 iMac 24″, internet, mail photo’s, and all default apps work fine, but only 4GB ram so it can be a tad slow. Apple has also removed all 32-bit-only apps from the Mac App Store. Zsh is the default login shell and interactive shell in macOS Catalina, replacing Bash, the default shell since Mac OS X Panther in 2003. Bash continues to be available in macOS Catalina, along with other shells such as csh/tcsh and ksh.

macOS Big Sur takes the most advanced operating system in the world to a whole new level of power and beauty, and makes your apps look better than ever. Widgets and the widget gallery help you deliver more value to your users. Adding intelligence to your apps with machine learning is simple with extensive tools, models, training capabilities, and APIs. You can create more powerful Mac versions of your iPad apps with Mac Catalyst. And you can easily bring your extensions to Safari — and to the App Store.

All-new Interface

1. Welcome to Adobe Photoshop 2019 for Mac OS Photoshop isn’t an image-creation program, which suggests that it isn’t acknowledged to form images from scratch. Instead, Photoshop is supposed to vary and improve existing images that are acquired through photography, scanners, or other means.
2. FFmpeg and 64-Bit. Audacity 3.0.0 for macOS is now a 64-bit application. If you use the optional FFmpeg library you will need to download the 64-bit versions of them. Installation of Audacity. Double-click the downloaded DMG to mount it. Drag the “Audacity.app” icon in the DMG window to the /Applications folder icon on the right.

macOS Big Sur brings a new design that’s been finely tuned for the powerful features that make a Mac a Mac. Core features, such as the menu bar and Dock, take advantage of the large Mac display, with translucent backings and spacious pull-down menus. The new Control Center, designed just for Mac, provides quick access to controls while keeping the menu bar clutter-free. Notification Center puts recent notifications and powerful new widgets together in a single view for at-a-glance information as you work. And a streamlined new design for apps features full-height sidebars and integrated toolbar buttons.

Widgets

Easily build widgets using the WidgetKit framework and the new widget API for SwiftUI. Widgets now come in multiple sizes, and users can visit the new widget gallery to search, preview sizes, and add them to Notification Center to access important details at a glance.

Safari Extensions

With support for the popular WebExtension API, it’s even easier to bring powerful extensions to Safari. Xcode 12 even includes a porting tool to streamline the process.

The new Extensions category on the Mac App Store showcases Safari extensions, with editorial spotlights and top charts to help users discover and download great extensions from the developer community.

Machine Learning

With macOS Big Sur, creating apps that leverage the power of machine learning is even easier and more extensive with additional tools in Core ML for model deployment, new models and training capabilities in Create ML, more APIs for vision and natural language, and improved resources for training on Mac and converting models to Core ML format.

Mac Catalyst

Create even more powerful Mac versions of your iPad apps. Apps built with Mac Catalyst now take on the new look of macOS Big Sur and help you better define the look and behavior of your apps. You can choose to turn off automatic scaling of iPad controls and layout, allowing you to precisely place every pixel on the screen. Provide full control of your app using just the keyboard, take advantage of the updated Photos picker, access more iOS frameworks, and more.

User privacy on the App Store

The Mac App Store helps users better understand apps’ privacy practices. You’ll need to enter your privacy practice details into App Store Connect for display on your product page.

Is Macos Catalina 64 Bit Only

Tools and resources

Macos Catalina Bittorrent

Use Xcode 12 and these resources to build apps for macOS Big Sur.