Mac Installer Plug-Ins Bug

anonymoussingh:

We maintain a macOS product whose installer uses custom InstallerSection plugin bundles to show configuration panes during install. Starting with macOS 27 beta 6, all of our plugins stopped loading in Installer.app — the panes never appear and the install fails because our preinstall step depends on data the panes collect.

HirohikoKihara (via Ric Ford):

A third-party PKG installer that ships a custom Installer Plugin no longer displays one of its selection panes. The plugin bundle appears not to be loaded, so the pane that it provides is silently skipped and the user cannot choose the intended installation option.

FE:

This is regression for all latest updates eg. 15.8, 27.7, 28.0. This bug refuse open installer plugin for security reason in spite of the plugin and installer are correctly signed, notarized and works seamlessly in previous macOS versions. Workaround is copy installer (*.pkg) to local file system (home, desktop folder).

Previously:

• macOS 27.0.1
• macOS 26.7.1 and macOS 15.8.1