Do Macau public transport and most stores accept Octopus Card that was purchased in HKIA?

I am sorry that the Octopus card is not applicable at the city. But you can buy a Macau pass at 7 Eleven Convenience Stores, Circle K Convenience Stores, US Marts, etc. You need to pay MOP 30 as the deposit, and add at least MOP 100 as the stored value. The pass is applicable on buses, convenience stores, supermarkets, etc. :)