Customize error message from pre- or post-install scripts

[lsh246]

When running a pre- or post-install script, there doesn't seem to be a way to pass information back to the installer to display a more descriptive error to the user if the script fails. We can call exit 1 from the script if there's an error, and then the standard Apple error message is shown: "The installation failed. The installer encountered an error that caused the installation to fail. Contact the software manufacturer for assistance." It would be nice if, for example, the script could output to stderr and have that shown to the user as the error message.

Is there any way that this is possible now? Would it be possible to add?

[packagesdev]

Is there any way that this is possible now?

No. The best you can do is to display an alert using an external binary that would be called from your script.

Would it be possible to add?

You would need to file a request to Apple using their Feedback Assistant as Installer.app does not support this at the time of this writing.

[ferben]

You can use osascript -e "display dialog \"Hello\"" in post-install script.