About macOS Catalina :

With macOS Catalina, you’ll love your Mac even more. Three brand new apps: Apple Music, Apple TV and Podcasts. New Find My app to help you find your lost Mac. Your favorite iPad apps are now on Mac. Ability to use iPad as a second display. Whatever you do, Mac will exceed your expectations.

Apple Music

50 million songs with an Apple Music subscription that you can download or listen to online.

iTunes Store, where you can purchase individual songs or albums.

The entire collection of music that you bought, downloaded or imported from CDs is in the updated music library.

Apple TV

Buy or rent new movies.

Start watching on one device and continue on another, including Apple TV, iPhone, iPad, and compatible smart TVs.

Podcasts

Find podcasts by title, topic, guest, host, or content.

Subscribe to your favorite podcasts and new episodes will be downloaded automatically.

Start listening to an episode on your Mac, continue on your iPhone, iPad or Apple Watch.

Synchronization and backup

Sync content, backup, update, and restore software using Finder when you connect your iPhone or iPad to your Mac.

App Store and Apple Arcade service

One subscription – more than 100 exciting new games without ads or additional purchases.

Learn about new games, get recommendations, and watch expert selections in the new Arcade tab in the App Store.

Play games on iPhone, iPod touch, iPad, Mac and Apple TV.

Mac Catalyst

With Mac Catalyst, developers can easily create Mac apps based on iPad apps.

Sidecar

Maximize your Mac’s workspace by connecting your iPad as a second display.

Open apps on different screens, sketch on your Mac, and share tools and palettes on your iPad.

Use Apple Pencil to power professional creative apps for Mac.

Continuity feature for marking and sketching

Sketch it on your iPad or iPhone and paste it into a document on your Mac.

Use your iPad or iPhone to sign PDFs and annotate screenshots stored on your Mac.

Universal access

Voice Control lets you control your Mac using just your voice.

If you enable text magnification under the cursor, a separate window will open with large, high-resolution text.

When you’re using two screens, Screen Zoom lets you zoom in on one of them.

Safety

The apps you use have been screened by Apple for known malware.

New security mechanisms: Apps ask for your permission to access data.

Locator

A new convenient app will help you find your devices and find out where your friends and family are.

You can track the location of devices even if they are not connected to Wi-Fi or a cellular network.

Activation Lock provides protection on Mac models with the Apple T2 Security Chip.

Photo

The impressive, dynamic interface will allow you to take a fresh look at your photos and memories.

Watch flashback videos, set the duration, choose the mood and title.

Safari

The redesigned Start page experience shows sites from your browsing history, bookmarks, reading list, iCloud tabs, and even links sent to you in Messages.

Safari offers strong passwords to protect your accounts.

Notes

In gallery mode, notes are displayed as visual thumbnails.

Improved search functionality finds text in scanned documents and recognizes objects in photos.

With the Shared Folders feature, you can share all the notes in a selected folder with others.

Reminders

With the new edit buttons, you can add a date, location, flag, attachment, and other useful information to your reminder.

System Requirements :

General Requirements

▪   OS X 10.9 or later
▪   4GB of memory
▪   12.5GB of available storage (OS X El Capitan 10.11.5 or later)*
▪   Some features require an Apple ID; terms apply.
▪   Some features require a compatible Internet service provider; fees may apply.

Mac Hardware Requirements

For details about your Mac model, click the Apple icon at the top left of your screen, choose About This Mac, then choose More Info. These Mac models are compatible with macOS Sierra:

▪  MacBook (Early 2015 or newer)
▪  MacBook Air (Mid 2012 or newer)
▪  MacBook Pro (Mid 2012 or newer)
▪  Mac mini (Late 2012 or newer)
▪  iMac (Late 2012 or newer)
▪  iMac Pro (2017)
▪  Mac Pro (Late 2013 or newer)