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Hi I'm trying to reduce the multicast DNS timeout by editing mdns_timeout, but when I do that I get:



2017-03-17 13:42:04.643 defaults[1706:22397] Could not write domain /System/Library/SystemConfiguration/IPMonitor.bundle/Contents/Info.plist; exiting


thank you for your help

@osxadmin You aren't going to be able to modify that .plist on 10.11 or later due to Apple's System Integrity Protection. See the following for more info:



About System Integrity Protection on your Mac



System Integrity Protection – Adding another layer to Apple’s security model


@StoneMagnet got it, thank you.



(ps: I'm on 10.12.3)