Installation via the KDE themes store

• Navigate through System Preferences to "Global Theme."
  
• Select the "Get New Global Themes" option in the top-right corner.
  
• In the new window that appears, search for "Apple Sonoma Light Plasma 6" and click "Install."
  
• Now, go back to the Global Theme section, select the newly installed theme, Apple Sonoma Light Plasma 6, and ensure both checkboxes are enabled: "Appearance settings" and "Desktop and window layout."
  
• Click "Apply" and watch as your desktop's appearance transforms completely.