Can I use Hong Kong Octopus card in Macau?

I'm curious to know, is it possible to utilize the Hong Kong Octopus card while I'm in Macau? I understand that the Octopus card is a widely accepted form of payment in Hong Kong, but I'm not sure if its functionality extends to neighboring Macau. Could you clarify whether I can rely on my Octopus card for transactions there, or if I should plan to use an alternative payment method?