If you specifically want to play the Nintendo Switch version (Mega Mix) rather than the PC version (Mega Mix+), the only way to do so on a computer is through emulation.
This method allows you to run the Switch game on your PC, but it requires a strong computer (CPU and GPU) to run smoothly. hatsune miku project diva megamix free download pc
The General Process (For Educational Purposes): If you specifically want to play the Nintendo
Why Mega Mix+ is Recommended over Emulation for this title: Since Mega Mix+ exists natively on PC, it is much easier to set up, runs better on lower-end hardware, and supports online leaderboards and achievements. Emulation is generally reserved for games that do not have a PC port. Why Mega Mix+ is Recommended over Emulation for
Hatsune Miku: Project DIVA MegaMix+ has a free demo available on Steam. The demo includes two songs:
You do not have to steal MegaMix to play Miku games. Here are legitimate low-cost options: