Crush the graham crackers in the food processor until they are fine.
Add the macadamia nuts and grind again.
Add the butter and process until all the ingredients are perfectly blended.
Press the mixture in a baking tray and let it set aside.
Beat the cream cheese in a bowl until fluffy.
Add the guava paste and beat again.
Gradually add the sweetened condensed milk and beat again.
Pour the mixture over the crust and spread using a spoon.
Pipe the whipped cream on top or spread using a spoon.
Chill for 2 hours or more, then cut into small pieces.