How do I get to Macau, coming from Kai Tak, Kowloon, Hongkong? Tnx.

You can take the ferry from China HK Ferry Terminal to reach M.
From Kai Tak, do you mean the Kai Tak Cruise Terminal?
If so, you can walk to Cruise Terminal to take the bus line 86 to reach Kowloon Bay (Telford Garden) Station, where you can change to line 14 to reach the CHINA FERRY TERMINAL BUS TERMINUS.
After that you can walk to the China HK Ferry Terminal in the China HK City.