What is the name of the 1990s Mac computer detective game where your game character has amnesia?

The main character wakes from unconsciousness and has no idea who he is but people are trying to kill him and he has to find out who he is and why they are trying to kill him, using the clues he finds in the game. There are alligators in the sewers.What is the name of the 1990s Mac computer detective game where your game character has amnesia?
I think the game you are thinking of is called Deja Vu by icom simulations.