Hi, It looks like we're also being affected by this issue - we develop an app for interacting with network-connected speakers, and Bonjour/mDNS discovery is required for a large part of the functionality. At the moment it's just a handful of tests that are impacted, but if/when developers update it will remove our ability to use the simulator. It seems to affect the CI build server I've just updated to macOS 15.4 but not my local machine still on 15.3.2. Is there any workaround for this, maybe setting a preference from the command line or similar? Also do you want me to also file a bug that can be linked to the internal one already filed?