@[email protected] By default, yes, `actool` will ignore .xcassets compatibility bitmaps that match the name of your app icon, and will instead substitute its own. However, if you use the super duper secret undocumented `--enable-icon-stack-fallback-generation=disabled` flag, it won’t. See https://source.chromium.org/chromium/chromium/src/+/cb9d61c26abea51d2ab51412352581a34574c8f9:tools/mac/icons/compile_car.py;l=154-164 . This worked as of db4; I really hope they didn’t break it in db5.
@siracusa @vslavik what app icon shows up in AppStoreConnect when you upload your Tahoe-compatible builds? I'm seeing the old AppIcon under the Build and Included Assets in the Distribution tab.
Running the app on Sequoia and Tahoe show the correct old icon and Icon Composer icon respectively.
TestFlight shows the Icon Composer icon.