Missing Icons on macOS Tahoe 26

[AkinoKaede]

After updating to macOS Tahoe 26, the app icons in Home Manager Trampolines directory are missing, and the app icons in Spotlight are also missing.

I have run darwin-rebuild, but this did not solve the problem.

> nix-info
system: "aarch64-darwin", multi-user?: yes, version: nix-env (Nix) 2.28.5, channels(root): "nixpkgs", nixpkgs: /nix/store/a8dg9cc4ffj1dg2s963crqmxfn3pgwyd-source

[hraban]

oh dear 🥲 I was holding off on updating. I'll try in a VM

[bbaserdem]

I have the same issue, but specifically with firefox. I configure firefox using home-manager's firefox module. The final package is exposed in I believe config.programs.firefox.finalPackage but I don't think mac-app-util functions properly set the proper trampoline for this. The final package provides an .app launcher in the nix store.

[hraban]

@bbaserdem mac-app-util creates trampolines at activation time, not nix eval time. The entire module system has been evaluated at that point and all derivations realized. It just looks in your ~/Applications/Home Manager Apps/* and mirrors it 1:1.

[bbaserdem]

Thank you, right after I posted this the problem fixed itself.

[littledivy]

I am also facing this issue. I think it might be this race condition described here:

mac-app-util/main.lisp

Lines 163 to 169 in 8414fa1

	;; Sometimes the OS displays blank or stock applescript icons for these
	;; generated apps in launchpad, finder, etc. It’s not 100% clear why and
	;; it’s hard to reproduce but this seems to help. Probably a race condition
	;; between generating the original wrapper and updating the icons. A
	;; cleaner solution would be building the app bundle in a temporary
	;; directory and only copying it in when fully ready, but this works for
	;; now.

It seems the workaround doesn't work anymore with Tahoe. The icons sometimes show up when I manually move the icns somewhere else and copy it back.

[hraban]

Thank you @littledivy I installed tahoe in a VM and will work on it now. Thanks for diving in, I'll start with a temp dir copy approach 👍

[hraban]

repro'd successfully. Looking into a fix.