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Mac wide_gamut_macos is failing: Unsupported pixel format: MTLPixelFormatBGRA8Unorm #182589

@jmagman

Description

@jmagman

Mac wide_gamut_macos is failing:
https://ci.chromium.org/ui/p/flutter/builders/staging/Mac%20wide_gamut_macos/514/overview

[2026-02-18 20:56:02.789277] [STDOUT] stdout: The following TestFailure was thrown running a test:
[2026-02-18 20:56:02.789282] [STDOUT] stdout: Expected: contains color [1.0931, -0.2268, -0.1501]
[2026-02-18 20:56:02.789285] [STDOUT] stdout:   Actual: [
[2026-02-18 20:56:02.789288] [STDOUT] stdout:             800,
[2026-02-18 20:56:02.791066] [STDOUT] stdout:             600,
[2026-02-18 20:56:02.791084] [STDOUT] stdout:             'MTLPixelFormatBGRA8Unorm',
[2026-02-18 20:56:02.791325] [STDOUT] stdout:             [
[2026-02-18 20:56:02.791334] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791337] [STDOUT] stdout:               247,
[2026-02-18 20:56:02.791340] [STDOUT] stdout:               254,
[2026-02-18 20:56:02.791342] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791671] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791724] [STDOUT] stdout:               247,
[2026-02-18 20:56:02.791740] [STDOUT] stdout:               254,
[2026-02-18 20:56:02.791892] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791909] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791913] [STDOUT] stdout:               247,
[2026-02-18 20:56:02.791916] [STDOUT] stdout:               254,
[2026-02-18 20:56:02.791919] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791921] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791924] [STDOUT] stdout:               247,
[2026-02-18 20:56:02.791927] [STDOUT] stdout:               254,
[2026-02-18 20:56:02.791930] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791932] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791940] [STDOUT] stdout:               247,
[2026-02-18 20:56:02.791942] [STDOUT] stdout:               254,
[2026-02-18 20:56:02.791945] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791947] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791950] [STDOUT] stdout:               247,
[2026-02-18 20:56:02.791953] [STDOUT] stdout:               254,
[2026-02-18 20:56:02.791955] [STDOUT] stdout:               255,
[2026-02-18 20:56:02.791958] [STDOUT] stdout:               ...
[2026-02-18 20:56:02.791960] [STDOUT] stdout:             ]
[2026-02-18 20:56:02.791963] [STDOUT] stdout:           ]
[2026-02-18 20:56:02.791966] [STDOUT] stdout:    Which: could not find any colors (unsupported pixel format?)
[2026-02-18 20:56:02.791969] [STDOUT] stdout: Unsupported operation: Unsupported pixel format: MTLPixelFormatBGRA8Unorm at #0      _findColor
[2026-02-18 20:56:02.791973] [STDOUT] stdout: (file:///Volumes/Work/s/w/ir/x/w/rc/tmpywcf4frw/flutter%20sdk/dev/integration_tests/wide_gamut_test/integration_test/app_test.dart:76:5)
[2026-02-18 20:56:02.791976] [STDOUT] stdout: #1      _HasColor.matches
[2026-02-18 20:56:02.791979] [STDOUT] stdout: (file:///Volumes/Work/s/w/ir/x/w/rc/tmpywcf4frw/flutter%20sdk/dev/integration_tests/wide_gamut_test/integration_test/app_test.dart:89:48)

Introduced in #181769.

cc @westito @gaaclarke

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    P1High-priority issues at the top of the work liste: impellerImpeller rendering backend issues and features requestsengineflutter/engine related. See also e: labels.platform-macBuilding on or for macOS specificallyteam-engineOwned by Engine teamtriaged-engineTriaged by Engine team

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