macOS Catalina — released in October 2019 — marked some major changes to the operating system. Not a single 32-bit app ran on Catalina, as Apple has made everything 64-bit in the OS and its frameworks. It’s the end of the road of older Mac applications, including every one using the Carbon APIs.

macOS 10.15 is also the first to support Catalyst, which allows developers to port their iPad apps to the Mac. Also new is SwiftUI, which is Apple’s long-term play to let developers write one app to run across all of Apple’s software platforms.

After 18 years, the kingdom of iTunes has fallen. Three new apps (Music, Podcasts and TV) are here to take over the old title’s various duties.

You can check out my Catalina review here.

Like Mojave before it, Catalina support both Light and Dark Modes, but Apple has added an “Auto” appearance that changes the desktop wallpaper, mode and Night Shift white balance as the day progresses. There are actually eight variants of the default wallpaper, which you can see here.

View all entries in the macOS Screenshot Library or check out OS X’s default wallpapers, updated for 6K Retina displays.

Sound Source

The 512 Pixels macOS Screenshot Library is sponsored by SoundSource, from the fine folks at Rogue Amoeba.

SoundSource puts powerful audio control of your Mac right in your menu bar. Adjust app volume instantly, apply audio effects to the audio you hear, and redirect that audio to any device connected to your Mac – now including AirPlay devices.

SoundSource: Sound control so good, it ought to be built into macOS.

Appearance & Accent Combinations

Catalina-Theme-Morning-Blue
Morning Blue
Catalina-Theme-Morning-Purple
Morning Purple
Catalina-Theme-Morning-Pink
Morning Pink
Catalina-Theme-Morning-Red
Morning Red
Catalina-Theme-Morning-Orange
Morning Orange
Catalina-Theme-Morning-Yellow
Morning Yellow
Catalina-Theme-Morning-Green
Morning Green
Catalina-Theme-Morning-Graphite
Morning Graphite
Catalina-Theme-Light-Blue
Day Blue
Catalina-Theme-Light-Purple
Day Purple
Catalina-Theme-Light-Pink
Day Pink
Catalina-Theme-Light-Red
Day Red
Catalina-Theme-Light-Orange
Day Orange
Catalina-Theme-Light-Yellow
Day Yellow
Catalina-Theme-Light-Green
Day Green
Catalina-Theme-Light-Graphite
Day Graphite
Catalina-Theme-Evening-Blue
Evening Blue
Catalina-Theme-Evening-Purpe
Evening Purple
Catalina-Theme-Evening-Pink
Evening Pink
Catalina-Theme-Evening-Red
Evening Red
Catalina-Theme-Evening-Orange
Evening Orange
Catalina-Theme-Evening-Yellow
Evening Yellow
Catalina-Theme-Evening-Green
Evening Green
Catalina-Theme-Evening-Graphite
Evening Graphite
Catalina-Theme-Dark-Blue
Dark: Blue
Catalina-Theme-Dark-Purple
Dark: Purple
Catalina-Theme-Dark-Pink
Dark: Pink
Catalina-Theme-Dark-Red
Dark: Red
Catalina-Theme-Dark-Orange
Dark: Orange
Catalina-Theme-Dark-Yellow
Dark: Yellow
Catalina-Theme-Dark-Green
Dark: Green
Catalina-Theme-Dark-Graphite
Dark: Graphite

Light Mode

10-15-Catalina-Light-Desktop
Desktop
10-15-Catalina-Light-About-This-Mac
About This Mac
10-15-Catalina-Light-System-Information
System Information
10-15-Catalina-Light-Stacks
Stacks
10-15-Catalina-Light-Desktop-Stacks
Desktop Stacks
10-15-Catalina-Light-Apple-Menu
Apple Menu
10-15-Catalina-Light-Finder-Menu
Finder Menu
10-15-Catalina-Light-Finder-Go-Menu
Go Menu
10-15-Catalina-Light-Finder-Go-To-Folder
Finder: Go to Folder
10-15-Catalina-Light-Finder-Connect-to-Server
Finder: Connect to Server
10-15-Catalina-Light-Finder-Network
Finder: Network
10-15-Catalina-Light-Finder-Home
Finder: Home
10-15-Catalina-Light-Finder-Gallery-View
Finder: Gallery View
10-15-Catalina-Light-Finder-Quick-Look
Finder: Quick Look
10-15-Catalina-Light-Finder-Quick-Look-Markup
Finder: Quick Look Markup
10-15-Catalina-Light-Finder-Get-Info
Finder: Get Info
10-15-Catalina-Light-Finder-Search
Finder: Search
10-15-Catalina-Light-Applications
Applications
10-15-Catalina-Light-Applications-Utilities
Applications: Utilities
10-15-Catalina-Light-Menu-Bar-Battery
Menu Bar: Battery
10-15-Catalina-Light-Command-Tab
App Switcher
10-15-Catalina-Light-Force-Quit
Force Quit
10-15-Catalina-Light-Finder-Copy
Finder: Copy
10-15-Catalina-Light-Finder-Copy-Replace
Finder: Replace
10-15-Catalina-Light-Finder-Empty-Trash
Finder: Empty Trash
10-15-Catalina-Light-Finder-Eject-Warning
Finder: Eject Warning
10-15-Catalina-Light-Fast-User-Switching-Menu
Fast User Switching
10-15-Catalina-Light-Fast-User-Switching
Fast User Switching
10-15-Catalina-Light-Spotlight
Spotlight
10-15-Catalina-Light-Spotlight-More
Spotlight: More Results
10-15-Catalina-Light-Mission-Control
Mission Control
10-15-Catalina-Light-Time-Machine-Menu
Menu Bar: Time Machine
10-15-Catalina-Light-Time-Machine
Time Machine
10-15-Catalina-Light-Launchpad
Launchpad
10-15-Catalina-Light-Launchpad-Folder
Launchpad: Folder
10-15-Catalina-Light-Full-Screen-App
Fullscreen App
10-15-Catalina-Light-Split-Screen-Aps
Split Screen Apps
10-15-Catalina-Light-Notification-Center-Today
Notification Center: Today
10-15-Catalina-Light-Notification-Center-Notifications
Notification Center: Notifications
10-15-Catalina-Light-Dictation
Dictation
10-15-Catalina-Light-Siri
Siri
10-15-Catalina-Light-Storage-Management
Storage Management
10-15-Catalina-Light-Text-Edit
TextEdit
10-15-Catalina-Light-Finder-Open
Open
10-15-Catalina-Light-Finder-Open-iCloud
Open: iCloud
10-15-Catalina-Light-Activity-Monitor
Activity Monitor
10-15-Catalina-Light-Airport-Utility
AirPort Utility
10-15-Catalina-Light-Automator
Automator
10-15-Catalina-Light-Books
Books
10-15-Catalina-Light-Boot-Camp-Assistant
Boot Camp Assistant
10-15-Catalina-Light-Calculator
Calculator
10-15-Catalina-Light-Calendar
Calendar
10-15-Catalina-Light-Calendar-Preferences
Calendar: Preferences
10-15-Catalina-Light-Chess
Chess
10-15-Catalina-Light-Console
Console
10-15-Catalina-Light-Contacts
Contacts
10-15-Catalina-Light-Dictionary
Dictionary
10-15-Catalina-Light-Disk-Utility
Disk Utility
10-15-Catalina-Light-FaceTime
FaceTime
10-15-Catalina-Light-Find-My
Find My
10-15-Catalina-Light-Font-Book
Font Book
10-15-Catalina-Light-Help
Help
10-15-Catalina-Light-Help-Search
Help: Search
10-15-Catalina-Light-Home
Home
10-15-Catalina-Light-Keychain-Access
Keychain Access
10-15-Catalina-Light-Mac-App-Store
Mac App Store
10-15-Catalina-Light-Mail
Mail
10-15-Catalina-Light-Mail-Preferences
Mail: Preferences
10-15-Catalina-Light-Maps
Maps
10-15-Catalina-Light-Messages
Messages
10-15-Catalina-Light-Music
Music
10-15-Catalina-Light-Music-Preferences
Music: Preferences
10-15-Catalina-Light-Network-Utility
Network Utility
10-15-Catalina-Light-News
News
10-15-Catalina-Light-Notes
Notes
10-15-Catalina-Light-Photo-Booth
Photo Booth
10-15-Catalina-Light-Photos
Photos
10-15-Catalina-Light-Podcasts
Podcasts
10-15-Catalina-Light-Podcasts-Preferences
Podcasts: Preferences
10-15-Catalina-Light-Preview-Search
Preview: Search
10-15-Catalina-Light-Preview
Preview
10-15-Catalina-Light-Print
Print
10-15-Catalina-Light-QuickTime
QuickTime Player
10-15-Catalina-Light-Reminders
Reminders
10-15-Catalina-Light-Safari-v13
Safari 13
10-15-Catalina-Light-Safari-v13-Favorites
Safari 13: Favorites
10-15-Catalina-Light-Safari-v13-Picture-in-Picture
Safari 13: Picture in Picture
10-15-Catalina-Light-Safari-v13-Preferences
Safari 13: Preferences
10-15-Catalina-Light-Safari-v13-Reader-Mode
Safari 13: Reader Mode
10-15-Catalina-Light-Safari-v13-Sharing
Safari 13: Sharing
10-15-Catalina-Light-Safari-v13-Tab-Overview
Safari 13: Tab Overview
10-15-Catalina-Light-Script-Editor
Script Editor
10-15-Catalina-Light-Stickies
Stickies
10-15-Catalina-Light-Stocks
Stocks
10-15-Catalina-Light-TV
TV
10-15-Catalina-Light-TV-Preferences
TV: Preferences
10-15-Catalina-Light-Voice-Memos
Voice Memos
10-15-Catalina-Light-System-Preferences-0
System Preferences
10-15-Catalina-Light-System-Preferences-Accessibility
System Preferences: Accessibility
10-15-Catalina-Light-System-Preferences-Apple-ID
System Preferences: Apple ID
10-15-Catalina-Light-System-Preferences-Bluetooth
System Preferences: Bluetooth
10-15-Catalina-Light-System-Preferences-Date-and-Time
System Preferences: Date & Time
10-15-Catalina-Light-System-Preferences-Desktop-and-Screen-Saver
System Preferences: Desktop & Screen Saver
10-15-Catalina-Light-System-Preferences-Displays
System Preferences: Displays
10-15-Catalina-Light-System-Preferences-Dock
System Preferences: Dock
10-15-Catalina-Light-System-Preferences-Energy-Saver
System Preferences: Energy Saver
10-15-Catalina-Light-System-Preferences-Extensions
System Preferences: Extensions
10-15-Catalina-Light-System-Preferences-Family-Sharing
System Preferences: Family Sharing
10-15-Catalina-Light-System-Preferences-General
System Preferences: General
10-15-Catalina-Light-System-Preferences-Internet-Accounts
System Preferences: Internet Accounts
10-15-Catalina-Light-System-Preferences-Keyboard
System Preferences: Keyboard
10-15-Catalina-Light-System-Preferences-Language-and-Region
System Preferences: Language & Region
10-15-Catalina-Light-System-Preferences-Mission-Control
System Preferences: Mission Control
10-15-Catalina-Light-System-Preferences-Mouse
System Preferences: Mouse
10-15-Catalina-Light-System-Preferences-Network
System Preferences: Network
10-15-Catalina-Light-System-Preferences-Notifications
System Preferences: Notifications
10-15-Catalina-Light-System-Preferences-Printers-and-Scanners
System Preferences: Printers & Scanners
10-15-Catalina-Light-System-Preferences-Screen-Time
System Preferences: Screen Time
10-15-Catalina-Light-System-Preferences-Security-and-Privacy
System Preferences: Security & Privacy
10-15-Catalina-Light-System-Preferences-Sharing
System Preferences: Sharing
10-15-Catalina-Light-System-Preferences-Sidecar
System Preferences: Sidecar
10-15-Catalina-Light-System-Preferences-Siri
System Preferences: Siri
10-15-Catalina-Light-System-Preferences-Software-Update
System Preferences: Software Update
10-15-Catalina-Light-System-Preferences-Sound
System Preferences: Sound
10-15-Catalina-Light-System-Preferences-Spotlight
System Preferences: Spotlight
10-15-Catalina-Light-System-Preferences-Startup-Disk
System Preferences: Startup Disk
10-15-Catalina-Light-System-Preferences-Time-Machine
System Preferences: Time Machine
10-15-Catalina-Light-System-Preferences-Touch-ID
System Preferences: Touch ID
10-15-Catalina-Light-System-Preferences-Trackpad
System Preferences: Trackpad
10-15-Catalina-Light-System-Preferences-Users-and-Groups
System Preferences: Users & Groups
10-15-Catalina-Light-System-Preferences-Wallet-and-Apple-Pay
System Preferences: Wallet & Apple Pay

Dark Mode

10-15-Catalina-Dark-Desktop
Desktop
10-15-Catalina-Dark-About-This-Mac
About This Mac
10-15-Catalina-Dark-System-Information
System Information
10-15-Catalina-Dark-Stacks
Stacks
10-15-Catalina-Dark-Desktop-Stacks
Desktop Stacks
10-15-Catalina-Dark-Apple-Menu
Apple Menu
10-15-Catalina-Dark-Finder-Menu
Finder Menu
10-15-Catalina-Dark-Finder-Go-Menu
Go Menu
10-15-Catalina-Dark-Finder-Go-to-Folder
Finder: Go to Folder
10-15-Catalina-Dark-Finder-Conect-to-Server
Finder: Connect to Server
10-15-Catalina-Dark-Finder-Network
Finder: Network
10-15-Catalina-Dark-Finder-Home
Finder: Home
10-15-Catalina-Dark-Finder-Gallery-View
Finder: Gallery View
10-15-Catalina-Dark-Finder-Quick-Look
Finder: Quick Look
10-15-Catalina-Dark-Finder-Quick-Look-Markup
Finder: Quick Look Markup
10-15-Catalina-Dark-Finder-Get-Info
Finder: Get Info
10-15-Catalina-Dark-Finder-Search
Finder: Search
10-15-Catalina-Dark-Applications
Applications
10-15-Catalina-Dark-Applications-Utilities
Applications: Utilities
10-15-Catalina-Dark-Menu-Bar-Battery
Menu Bar: Battery
10-15-Catalina-Dark-Command-Tab
App Switcher
10-15-Catalina-Dark-Force-Quit
Force Quit
10-15-Catalina-Dark-Finder-Copy
Finder: Copy
10-15-Catalina-Dark-Finder-Copy-Replace
Finder: Replace
10-15-Catalina-Dark-Finder-Empty-Trash
Finder: Empty Trash
10-15-Catalina-Dark-Finder-Eject-Warning
Finder: Eject Warning
10-15-Catalina-Dark-Fast-User-Switching-Menu
Fast User Switching
10-15-Catalina-Dark-Fast-User-Switching
Fast User Switching
10-15-Catalina-Dark-Spotlight
Spotlight
10-15-Catalina-Dark-Spotlight-More
Spotlight: More Results
10-15-Catalina-Dark-Mission-Control
Mission Control
10-15-Catalina-Dark-Time-Machine-Menu
Menu Bar: Time Machine
10-15-Catalina-Dark-Time-Machine
Time Machine
10-15-Catalina-Dark-Launchpad
Launchpad
10-15-Catalina-Dark-Launchpad-Folder
Launchpad: Folder
10-15-Catalina-Dark-Full-Screen-App
Fullscreen App
10-15-Catalina-Dark-Split-Screen-Apps
Split Screen Apps
10-15-Catalina-Dark-Notification-Center-Today
Notification Center: Today
10-15-Catalina-Dark-Notification-Center-Notifications
Notification Center: Notifications
10-15-Catalina-Dark-Dictation
Dictation
10-15-Catalina-Dark-Siri
Siri
10-15-Catalina-Dark-Stroage-Management
Storage Management
10-15-Catalina-Dark-Activity-Monitor
Activity Monitor
10-15-Catalina-Dark-TextEdit
TextEdit
10-15-Catalina-Dark-Finder-Open
Open
10-15-Catalina-Dark-Finder-Open-iCloud
Open: iCloud
10-15-Catalina-Dark-Print
Print
10-15-Catalina-Dark-AirPort-Utility
AirPort Utility
10-15-Catalina-Dark-Automator
Automator
10-15-Catalina-Dark-Books
Books
10-15-Catalina-Dark-Boot-Camp-Assistant
Boot Camp Assistant
10-15-Catalina-Dark-Calculator
Calculator
10-15-Catalina-Dark-Calendar
Calendar
10-15-Catalina-Dark-Calendar-Preferences
Calendar: Preferences
10-15-Catalina-Dark-Chess
Chess
10-15-Catalina-Dark-Console
Console
10-15-Catalina-Dark-Contacts
Contacts
10-15-Catalina-Dark-Dictionary
Dictionary
10-15-Catalina-Dark-Disk-Utility
Disk Utility
10-15-Catalina-Dark-FaceTime
FaceTime
10-15-Catalina-Dark-Find-My
Find My
10-15-Catalina-Dark-Font-Book
Font Book
10-15-Catalina-Dark-Help
Help
10-15-Catalina-Dark-Help-Search
Help: Search
10-15-Catalina-Dark-Home
Home
10-15-Catalina-Dark-Keychain-Access
Keychain Access
10-15-Catalina-Dark-Mac-App-Store
Mac App Store
10-15-Catalina-Dark-Mail
Mail
10-15-Catalina-Dark-Mail-Preferences
Mail: Preferences
10-15-Catalina-Dark-Maps
Maps
10-15-Catalina-Dark-Messages
Messages
10-15-Catalina-Dark-Music
Music
10-15-Catalina-Dark-Music-Preferences
Music: Preferences
10-15-Catalina-Dark-Network-Utility
Network Utility
10-15-Catalina-Dark-News
News
10-15-Catalina-Dark-Notes
Notes
10-15-Catalina-Dark-Photo-Booth
Photo Booth
10-15-Catalina-Dark-Photos
Photos
10-15-Catalina-Dark-Podcasts
Podcasts
10-15-Catalina-Dark-Podcasts-Preferences
Podcasts: Preferences
10-15-Catalina-Dark-Preview
Preview
10-15-Catalina-Dark-Preview-Search
Preview: Search
10-15-Catalina-Dark-QuickTime
QuickTime Player
10-15-Catalina-Dark-Reminders
Reminders
10-15-Catalina-Dark-Script-Editor
Script Editor
10-15-Catalina-Dark-Stickies
Stickies
10-15-Catalina-Dark-Stocks
Stocks
10-15-Catalina-Dark-Safari-v13
Safari 13
10-15-Catalina-Dark-Safari-v13-Favorites
Safari 13: Favorites
10-15-Catalina-Dark-Safari-v13-Picture-in-Picture
Safari 13: Picture in Picture
10-15-Catalina-Dark-Safari-v13-Preferences
Safari 13: Preferences
10-15-Catalina-Dark-Safari-v13-Reader-Mode
Safari 13: Reader Mode
10-15-Catalina-Dark-Safari-v13-Sharing
Safari 13: Sharing
10-15-Catalina-Dark-Safari-v13-Tab-Overview
Safari 13: Tab Overview
10-15-Catalina-Dark-TV
TV
10-15-Catalina-Dark-TV-Preferences
TV: Preferences
10-15-Catalina-Dark-Voice-Memos
Voice Memos
10-15-Catalina-Dark-System-Preferences-0
System Preferences
10-15-Catalina-Dark-System-Preferences-Accessibility
System Preferences: Accessibility
10-15-Catalina-Dark-System-Preferences-Apple-ID
System Preferences: Apple ID
10-15-Catalina-Dark-System-Preferences-Bluetooth
System Preferences: Bluetooth
10-15-Catalina-Dark-System-Preferences-Date-and-Time
System Preferences: Date & Time
10-15-Catalina-Dark-System-Preferences-Desktop-and-Screen-Saver
System Preferences: Desktop & Screen Saver
10-15-Catalina-Dark-System-Preferences-Displays
System Preferences: Displays
10-15-Catalina-Dark-System-Preferences-Dock
System Preferences: Dock
10-15-Catalina-Dark-System-Preferences-Energy-Saver
System Preferences: Energy Saver
10-15-Catalina-Dark-System-Preferences-Extensions
System Preferences: Extensions
10-15-Catalina-Dark-System-Preferences-Family-Sharing
System Preferences: Family Sharing
10-15-Catalina-Dark-System-Preferences-General
System Preferences: General
10-15-Catalina-Dark-System-Preferences-Internet-Accounts
System Preferences: Internet Accounts
10-15-Catalina-Dark-System-Preferences-Keyboard
System Preferences: Keyboard
10-15-Catalina-Dark-System-Preferences-Language-and-Region
System Preferences: Language & Region
10-15-Catalina-Dark-System-Preferences-Mission-Control
System Preferences: Mission Control
10-15-Catalina-Dark-System-Preferences-Mouse
System Preferences: Mouse
10-15-Catalina-Dark-System-Preferences-Network
System Preferences: Network
10-15-Catalina-Dark-System-Preferences-Notifications
System Preferences: Notifications
10-15-Catalina-Dark-System-Preferences-Printers-and-Scanners
System Preferences: Printers & Scanners
10-15-Catalina-Dark-System-Preferences-Screen-Time
System Preferences: Screen Time
10-15-Catalina-Dark-System-Preferences-Security-and-Privacy
System Preferences: Security & Privacy
10-15-Catalina-Dark-System-Preferences-Sharing
System Preferences: Sharing
10-15-Catalina-Dark-System-Preferences-Sidecar
System Preferences: Sidecar
10-15-Catalina-Dark-System-Preferences-Siri
System Preferences: Siri
10-15-Catalina-Dark-System-Preferences-Software-Update
System Preferences: Software Update
10-15-Catalina-Dark-System-Preferences-Sound
System Preferences: Sound
10-15-Catalina-Dark-System-Preferences-Spotlight
System Preferences: Spotlight
10-15-Catalina-Dark-System-Preferences-Startup-Disk
System Preferences: Startup Disk
10-15-Catalina-Dark-System-Preferences-Time-Machine
System Preferences: Time Machine
10-15-Catalina-Dark-System-Preferences-Touch-ID
System Preferences: Touch ID
10-15-Catalina-Dark-System-Preferences-Trackpad
System Preferences: Trackpad
10-15-Catalina-Dark-System-Preferences-Users-and-Groups
System Preferences: Users & Groups
10-15-Catalina-Dark-System-Preferences-Wallet-and-Apple-Pay
System Preferences: Wallet & Apple Pay
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