If your DVD is scratched or dirty, your dvd player can accept discs but they do not mount or are automatically ejected.
You can repair disc permission to solve “DVD player not working on Mac” issue. Try to reset the computer’s SMC to see if your DVD player can work on Mac or not. You will need to repair the DVD drive or purchase a new one in order to watch DVD movies on Mac. If your DVD drive is bad or damaged, the dvd player program will not be open. There are many reasons that cause the issue “the default DVD Player not working on Mac” in macOS Monterey, Big Sur, Catalina, Mojave, High Sierra, Sierra, EL Capitan, Yosemite, Mavericks, Mountain Lion, Lion, Snow Leopard, Leopard.
