Develop a Mac Application

The project is to build an app for Mac OS X with following functionalities Input field 'A': Select multiple excel files Check box 'AA': Remove duplicates (check/uncheck) Unique Identifier 'B': Text field to input column no (For example A, Z, AA, BC) Input field 'C': Select single excel File Functionality 1: the system to merge all selected files from Input 'A' (Removing duplicates depending upon check condition in 'AA' based on Column in 'B' ) Functionality 2: The system should delete the field in result generated from Functionality 1 based on the Unique Identifier ('A'-'C' based on Column in 'B') If the Input B is not selected the system should run normally by; merging all selected files and removing duplicates.