@Henk de Keijzer, Thanks for posting in Q&A. Based on my researching, there's a known issue with macOS 15 if Stealth Mode is enabled in a device compliance policy. The Mac devices do not respond to either “ping” requests or connection attempts from a closed TCP or UDP network. Please check if we have set this. If yes, you can mitigate this by configuring the Stealth Mode setting to be Not configured for devices running macOS 15 and later:
Hope the above information can help.
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