[Bug]: "not installing shadowed plugin" when using macOS app bundle packaging.

[jglogan]

I have done the following

• I have searched the existing issues
• If possible, I've reproduced the issue using the 'main' branch of this project

Steps to reproduce

When doing macOS bundle packaging, it's necessary to take a CLI-tool-unfriendly structure like this:

./Contents/MacOS/container
./Contents/MacOS/container-apiserver
./Contents/Resources/plugins/container-core-images.app/Contents/MacOS/container-core-images
./Contents/Resources/plugins/container-core-images.app/Contents/Resources/config.json
./Contents/Resources/plugins/container-core-images.app/Contents/Resources/config.toml
./Contents/Resources/plugins/container-core-images.app/Contents/Info.plist
./Contents/Resources/plugins/container-network-vmnet.app/Contents/MacOS/container-network-vmnet
./Contents/Resources/plugins/container-network-vmnet.app/Contents/Resources/config.toml
./Contents/Resources/plugins/container-network-vmnet.app/Contents/Info.plist
./Contents/Resources/plugins/container-runtime-linux.app/Contents/MacOS/container-runtime-linux
./Contents/Resources/plugins/container-runtime-linux.app/Contents/Resources/config.toml
./Contents/Resources/plugins/container-runtime-linux.app/Contents/Info.plist
./Contents/Info.plist

And create symlinks from a linux install hierarchy:

bin/container -> ${BUNDLE_ROOT}/Contents/MacOS/container
bin/container-apiserver -> ${BUNDLE_ROOT}/Contents/MacOS/container-apiserver

And then copy the unpackaged bundle-structured plugin hierarchy to libexec to match what's done with the normal make install structure equivalent to the command:

cp -a ${BUNDLE_ROOT}/Contents/Resources/plugins libexec/container/plugins

If you then start the system and look at the logs, you'll see the plugin loader complain with messages like:

2026-04-24 20:11:51.776063-0700 0x541dca   Default     0x0                  54410  0    container-apiserver: [com.apple.container:APIServer] not installing shadowed plugin [path=/usr/local/libexec/container/plugins/container-runtime-linux.app] [name=container-runtime-linux]

These messages are distracting and suggest that the plugin loader isn't working as it should.

Problem description

See above

Environment

- OS: 26
- Xcode: 26
- Container: main

Code of Conduct

• I agree to follow this project's Code of Conduct