Michael McDonald's journey began in Fullerton, Orange County, California, where he spent his formative years. He then pursued higher education at the University of Southern California, graduating with a degree in Business. Following his academic endeavors, McDonald embarked on a career in finance, serving as a loan officer at a prominent bank in Los Angeles.
However, a pivotal moment in his life occurred when a friend invited him to attend a sketch comedy and improv show at the renowned Groundling Theater in Los Angeles. This experience had a profound impact on McDonald, prompting him to reevaluate his professional path. He subsequently left his job as a banker and enrolled in the Groundling's Improv Program, becoming a member of the troupe from 1992 to 1997.
As McDonald's passion for comedy and acting continued to grow, he secured his first professional writing and acting jobs at Concorde Pictures, the infamous low-budget movie studio founded by Roger Corman. Initially, McDonald worked as an extra, eventually landing small roles in numerous B-movies during the early 1990s.
Through perseverance and dedication, McDonald's career gradually progressed, with him earning bigger roles and eventually taking on writing and directing responsibilities for some films. As his experience in the industry expanded, McDonald also appeared in various television sitcoms throughout the mid-1990s, laying the groundwork for his future success.
The culmination of his hard work and determination came when McDonald landed a starring role on the popular sketch comedy show Mad TV in 1995, marking a significant milestone in his career.