The response from the time server seems to have been an old duplicate packet.
The response from the time server seems to have been an old packet.
The response from the time server had invalid data. The originate or received field was zero.
The time could not be set within the accuracy specified.
The NTP authentication failed.
The time server was not synchronized and therefore may not have the correct time. It may have just rebooted.
The time server reported being in an invalid stratum. It could not be used to set the time.
The delay or dispersion values for the time server were out of the acceptable range.
The response from the time server was an invalid length packet.
The time server response did not come from the NTP port. There is something wrong with the server that sent this packet.
The time server response came from a different IP address than the request went to. This may have just been an old packet.
The time server is not using a version of NTP that Network Time understands.
The response from the time server caused an arithmetic overflow. Either the time server was not synchronized or your Macintosh has a very strange date set.
The reponse from the time server was an empty packet.
