> ifconfig eth0 hw ether AA:AA:AA:AA:AA:AA does not help...
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In Linux the Mac address needs to be changed to the lowered interface. Maybe here the same?
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sudo ifconfig en0 down
en0 sudo ifconfig hw ether AA:AA:AA:AA:AA:AA
sudo ifconfig en0 up
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Or even one line:
sudo ifconfig en0 down hw ether AA:AA:AA:AA:AA:AA up