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Xcode 26, macOS 26, attempting to use alternate dock icons

I have added multiple status icons to my project, in the form of .icon files created with Icon Composer. The main app icon works, but the status icons are not working.

I am attempting to load the images from the asset catalog using NSImage imageNamed:, and apply them to the NSApp dockTile using NSGlassEffectContainerView. I don't even know if that attempt is going to work, as I never get past the stage of NSImage loading the icons.

Maybe someone on the forums knows what to do there? I'd be willing to use one of my coding support incidents to work through this if necessary, as my two incidents will expire as my subscription rolls over in August anyway.

My project lives at https://github.com/losnoco/cog/, and the Tahoe attempt WIP lives in the wip.tahoe branch, with the latest commit as of this post being the attempt to adapt the Dock Icon generation.

I'd love to know if I can adapt this easily. I'm also still trying to support existing non-Glass custom .png icons the user can add to their profile folder with buttons in the preferences, as well as supporting legacy status icons on pre-Tahoe installs. I also try to add a progress bar to the dock tile view when the app is processing something at length.

Xcode 26, macOS 26, attempting to use alternate dock icons
 
 
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