On macOS a lower resolution Wireshark icon is displayed in the App Switcher and Launchpad

Summary

A regression has been introduced in the resolution of the Wireshark icon displayed in the macOS App Switcher and LaunchPad when using the latest automated development releases,

Steps to reproduce

1 - Install recent automated development release version of Wireshark on macOS

2 - Start Wireshark

3 - Review the Wireshark icon displayed in the macOS App Switcher or LaunchPad.

What is the current bug behavior?

The resolution of the Wireshark icon displayed in certain contexts has degraded.

What is the expected correct behavior?

The Wireshark icons displayed in certain contexts should display with higher resolution.

Relevant logs and/or screenshots

Newer development version showing lower resolution icon in App Switcher.

Older development version showing higher resolution icon in App Switcher. Compare with example above from more recent development version.

Build information

% Wireshark --version 
Wireshark 4.5.0rc0-2492-g5e7c432b9a4c (v4.5.0rc0-2492-g5e7c432b9a4c).

Copyright 1998-2025 Gerald Combs <gerald@wireshark.org> and contributors.
Licensed under the terms of the GNU General Public License (version 2 or later).
This is free software; see the file named COPYING in the distribution. There is
NO WARRANTY; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

Compile-time info:
 Bit width: 64-bit
  Compiler: Clang 14.0.3 (clang-1403.0.22.14.1)
      GLib: 2.84.1
 With:
  +automatic updates         +Lua 5.4.7                 +QtMultimedia
  +brotli                    +LZ4 1.10.0                +Snappy 1.2.2
  +Gcrypt 1.11.0             +MaxMind                   +Sparkle
  +GnuTLS 3.8.9 and PKCS#11  +Minizip-ng 4.0.10         +zlib 1.2.11
  +Kerberos (MIT)            +nghttp2 1.65.0            +zlib-ng 2.2.4
  +libpcap                   +nghttp3 1.9.0             +Zstandard 1.5.7
  +libsmi 0.4.8              +PCRE2 10.45 2025-02-05
  +libxml2 2.14.2            +Qt 6.8.3
 Without:
  -POSIX capabilities

Runtime info:
      OS: macOS 15.5, build 24F74 (Darwin 24.5.0)
     CPU: Intel(R) Core(TM) i9-9880H CPU @ 2.30GHz (with SSE4.2)
  Memory: 16384 MB of physical memory
    GLib: 2.84.1
  Locale: LC_TYPE=en_US.UTF-8
 Plugins: supported, 0 loaded
 With:
  +brotli 1.1.0            +libsmi 0.4.8            +Qt 6.8.3
  +c-ares 1.34.5           +LZ4 1.10.0              +zlib 1.2.12
  +Gcrypt 1.11.0           +nghttp2 1.65.0          +Zstandard 1.5.7
  +GnuTLS 3.8.9            +nghttp3 1.9.0
  +libpcap 1.10.1          +PCRE2 10.45 2025-02-05

Additional information

This regression appears to have been introduced between development releases 4.5.0rc0-2417-gc9f95524acf2 and 4.5.0rc0-2474-g27597b9966a3.