The Prompter People Flip-Q Pro USB teleprompting software for Mac and PC comes on it's own USB drive, it's not a download. The Flip-Q USB drive version contains both the PC 2.4 version and Mac 1.6 versions of the Flip-Q Pro teleprompting software. These latest versions of the Flip-Q software allow the user to run Flip-Q on any Mac or PC where they have full permissions. The software "lives" on the USB stick and is easily movable between computers. The PC version runs on Windows platforms from XP - WIN10. Mac version runs on any Intel equipped Mac. Plug into your computer and run the software directly from the stick, no installation needed.