Please go to the TI Software, OS Updates and Apps page and download 'TI-SmartView™ Emulator Software for the TI-84 Plus Family.' Allow the program to install. However, there is no functional difference.
Functions are all the same as on the calculators we lend out, although the graphing 'screen' is in color. For an exact replica of a physical calculator that you can use on Mac or Windows computers, Texas Instruments offers a 90 day trial software that will allow you to interact on screen with a calculator that is identical to their TI 84 Plus line of calculators.