You can apply for a Macao visa-upon-arrival at at the Immigration counter. The requirements are as follows:
1. A completed application form;
2. Photocopies of the bio data page and used inside pages of a valid passport/travel document.
3. Document of financial status (e.g. bank statement, deposit in savings account, tax payment receipt, employment certificate, etc.)
4. Document of transportation to Macao and accommodation arrangement (e.g. round-trip air ticket and hotel room reservation receipts, etc.)
5. Recent 1.5-inch full face white background color photo.
The fee is about MOP100 per person.