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Container GUI 1.2.1

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@Bramgus12 Bramgus12 released this 23 Aug 19:52
· 21 commits to main since this release
v1.2.1
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Bramgus12 Bram Gussekloo
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Install or upgrade with:

curl -fsSL https://raw.githubusercontent.com/Bramgus12/container-gui/main/scripts/install.sh | bash

Container GUI 1.2.1 is the first release signed with a Developer ID certificate
and notarized by Apple. The application code is unchanged from 1.2.0.

Changes

  • Signs the app and the disk image with a Developer ID Application certificate,
    notarizes both with Apple, and staples the tickets to each. macOS now accepts
    the app on first launch with no Privacy & Security approval, and the check
    works offline.
  • Rewrites scripts/release.sh to run the whole signing, notarization, and
    stapling pipeline, verifying the Hardened Runtime, the secure timestamp, and
    the Gatekeeper assessment of both artifacts before it reports success.

Compatibility and validation

  • macOS 26 or later on Apple-silicon Macs.
  • Apple Container CLI 0.12.0 or later and earlier than 2.0.0.
  • Apple's notary service accepted both the app and the disk image. Verified on
    Apple silicon with macOS 27.0 on 23 August 2026 that spctl --assess reports
    accepted with source=Notarized Developer ID for the app and the image, and
    that the app still carries a valid stapled ticket after being copied out of
    the disk image.
  • Runtime behavior carries over from the 1.2.0 validation, since no application
    code changed in this release.

Download verification

SHA-256: 7f38c8e161880eac0dd0d83b34d414721751f66cb76dc4872602ef084be36afd

The disk image is signed with a Developer ID Application certificate and
notarized by Apple. Verify an installed copy yourself with:

spctl --assess --type execute --verbose=4 "/Applications/Container GUI.app"

Upgrade and rollback

Re-run the install command above to upgrade in place. To roll back, pin a
previous release, for example:

curl -fsSL https://raw.githubusercontent.com/Bramgus12/container-gui/main/scripts/install.sh | bash -s -- --version v1.2.0

Releases up to and including 1.2.0 are ad-hoc signed and not notarized, so
rolling back to one restores the Gatekeeper approval steps described in their
release notes.

Known limitations

The app does not yet manage registry authentication, build secrets or SSH
forwarding, interactive terminals, import/export, or kernel settings,
image/container pruning, or remote hosts.

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