Macau visa from Singapore

First, dear, I need to tell you that I'm not sure whether the embassy in SG will accept your application. So if you have enough time, you had better apply for it at your own country. Then, the documents you need to prepare include:
1. A completed application form;
2. Copy of the bio data page and used inside pages of a valid passport;
3. Document of financial status (e.g. bank statement, bank book of savings account, tax receipt, employment certificate, etc.);
4. Document of transportation to Macao and accommodation arrangement (e.g. round-trip air ticket and hotel reservation receipts, etc.);
5. Proof of purpose of visit (e.g. travel itinerary, tour package receipt, etc.);
6. Valid entry permit of other countries or regions.