In Macau, the list of the 20 most popular technical companies would likely encompass a diverse range of businesses catering to the digital and technology-driven landscape.

1. Apple Inc., known for its hardware and software products.
2. Cisco Systems, a global leader in networking equipment.
3. Microsoft Corporation, offering a suite of products including Windows, Office, and Azure.
4. Huawei Technologies Co., Ltd., a major player in telecommunications infrastructure and devices.
5. Oracle Corporation, a leading provider of database management systems and cloud technologies.
6. Fujitsu Limited, an international technology company specializing in computing, communications, and information services.
7. Western Digital Corporation, a global leader in data storage solutions.
8. Hitachi Ltd., a diversified multinational company operating in several sectors including information and communication technology.
9. Samsung Electronics Co., Ltd., a leading global electronics company with strong presence in the tech sector.
10. Amdocs Limited, a global provider of software services to communications and media companies.

This list is dynamic as new players enter or established ones gain more popularity based on various factors such as market share, innovative products, or successful business strategies.