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Thank you again ,Vitaliy .

 d $system.OBJ.DisplayError(##class(%Net.Remote.Utility).RunCommandViaCPIPE("getmac /NH /fo table",,.result))
 w $p(result," ",1)

this method might be return the server physical address.If I use this method on my  pc (PC as server),it return ture physical address.

Thank you Vitaliy,but just as Danny say,it is the same as 'write $SYSTEM.INetInfo.EthernetAddress(0)',and in cache 2010 I can not use '

w $$$DEFETHADDR

'

Thanks.But I have something wrong with my description,I want know  how to use M get Computer physical address.

Really thank you,sir.Version 2010 don't have,version 2016 have this method.