Visa for Macao

Taking my two sisters to Singapore, Malaysia, Macau as their birthday gift.I am planning to take my sisters visiting these wonderful places within 10 days period. I've been promising them since 2009 and these plans are always postponed due to conflict work schedule..This time I'm ready to travel with them to these places mentioned above. Any visa requirements needed ? I will be coming from US to Phils. then travel with them to Singapore, Malaysia, Macau then back to Phils.