Sim Tower Cheats (Macintosh)

Before clicking on anything else, select a lobby and using
  the scroll bars, go to the bottom most side of the left screen
  and click once. BOOM! $4,000,000!

For the Triple Lobby you need to put it on the 1st, 15th, or 30th floor. Click the lobby
and hold option and shift and click on the 1st, 15th, or 30 th floor and boom. You will
have the 1st, 2nd, and third floor lobby's. You could have it on the 15th, 16th, and 17th
floor. You could have it on the 30th, 31st, and 32nd.

When creating the first lobby, push option and the mouse
  button to make it a double decker.

The best way of getting somewhere is this: build condominiums.
  You get more stars as you get more people. You get more people
  as you get more condos. Condos are a sure source of income.
  Build something necessary (nursery, elevator, parking, etc) as
  needed, but build a ton of condominiums!