Devolutions.AvaloniaTheme.MacOS 2026.6.16

Custom Avalonia Themes developed by Devolutions

👁 Build Status
👁 NuGet Version
👁 NuGet Downloads

MacOS Theme [Work in Progress]

(Inspired by @MikeCodesDotNET's earlier draft)

This theme is currently based on Avalonia.Themes.Fluent, both as a fallback for any controls not covered yet and as starting point for our (somewhat simplified) style definitions targeting AppKit macOS look.

While we are prioritizing controls for Devolutions Remote Desktop Manager initially, the goal is to create a theme that helps all of the Avalonia community to bring a native look to their macOS apps.

• Installation
• Styled Controls
  • ✅ Available in the current build
    • AutoCompleteBox
    • Button
    • ButtonSpinner
    • Calendar
      • CalendarButton
      • CalendarDatePicker
      • CalendarDayButton
      • CalendarItem
    • CheckBox
    • ComboBox
      • ComboBoxItem
    • ContextMenu
    • DataGrid
    • EditableComboBox (Custom control)
    • Expander
    • GridSplitter
    • ListBox
      • ListBoxItem
    • Menu
    • MenuFlyoutPresenter
    • MenuItem
    • NumericUpDown
      • ButtonSpinner
    • RadioButton
    • ScrollViewer
      • ScrollBar
    • Separator
    • TabControl
      • TabItem
    • TagInput (Custom control)
    • TextBox
    • ToggleSwitch (basic switch only)
    • ToolTip
    • TreeView
      • TreeViewItem
    • Window
    • Dark mode support
    • Limited inactive window behaviour (Accent colours switch to subdued look)
  • 🚧 In progress ...

    • small improvements & fixes, some code cleanup

    • SplitButton

    • CheckBoxListBox Custom control

    • MultiComboBox Custom control

  • 🔮 Next on the road map ...
    • DropDownButton

Installation

Install the Devolutions.AvaloniaTheme.MacOS package via NuGet:

Install-Package Devolutions.AvaloniaTheme.MacOS

or .NET

dotnet add package Devolutions.AvaloniaTheme.MacOS

In your App.axaml, replace the existing theme (e.g. <FluentTheme /> or <SimpleTheme />) with the macOS theme:

<Application ...>
 <Application.Styles>
 <DevolutionsMacOsTheme />
 </Application.Styles>
</Application>

Note: Some global Styles will also be loaded by default, you can opt out by setting GlobalStyles to false (<DevolutionsMacOsTheme GlobalStyles="False" />). GlobalStyles are also available as a separate tag <DevolutionsMacOsThemeGlobalStyles /> to cover scenarios where consumers would like to scope them to some control instead of including them globally. This is may be necessary to prevent styles from "bleeding out" in cases where that might be undesirable.

Styled Controls

Most of the images below are screenshots from the SampleApp test and demo pages - feel free to check out the code there for more detailed usage examples.

For an always up-to-date visual reference you can also browse the baseline screenshots.