Inaccessible .bnnsir files on macOS Sequoia, Part 3

April 17 2025

My previous blog post mentioned that I filed a bug report with Apple: ~/Library/Group Containers/group.com.apple.CoreSpeech/Caches/onDeviceCompilationCaches/ recreated on every login with Siri disabled (FB17163068). I've now discovered—by manually browsing Feedback Assistant—that my bug report has been given the resolution "Investigation complete - Unable to diagnose with current information". This is despite the fact that the bug is 100% reproducible for me on two different Macs, and despite the fact that Apple has not requested more information from me, which is why I had to discover the so-called "resolution" myself.

Thus, I'm making a plea to my followers: if you can reproduce this bug, please let me know. And if you don't mind, let Apple know too. Moreover, if there are any Apple engineers reading this, could you please look at my bug report and maybe poke your colleagues about it? I wonder how it's an acceptable response to a bug report to simply close it and refuse to investigate further.

Below is the text of my bug report FB17163068.

Please describe the issue and what steps we can take to reproduce it: I've disabled Siri, but nonetheless if I delete the ~/Library/Group Containers/group.com.apple.CoreSpeech/Caches/onDeviceCompilationCaches/ directory, it gets recreated on every login. This also happens if I quit the corespeechd process.

Steps to reproduce:

1. Enable Siri
2. Disable Siri
3. Delete ~/Library/Group Containers/group.com.apple.CoreSpeech/Caches/onDeviceCompilationCaches/
4. Logout and login again

Expected results: ~/Library/Group Containers/group.com.apple.CoreSpeech/Caches/onDeviceCompilationCaches/ is still gone.

Actual results: ~/Library/Group Containers/group.com.apple.CoreSpeech/Caches/onDeviceCompilationCaches/ is recreated.

This is a problem because of FB17162985 hdiutil create copy error with Siri CoreSpeech .bnnsir files