hw can we go to tst for star ferry going to macau from hk int'l airport terminal 1. need advice pls.

Well, at HK Airport, you can take airport shuttle bus no. A21 and get off at TST Station. Actually, the Star Ferry Terminal only provides the ferries in HK. So upon your arrival at TST, you can walk to China Ferry Terminal where you can take a ferry to Macau.

Anyway, you should know that Skypier near HK Airport where you can find the ferries taking you to Macau directly. So you need not go to TST, then take a ferry.