2000s
In 2000, MacDonald got sponsorship on his truck from 3M and was able to make his first full-time schedule in NASCAR, posting a sixth-place run at Daytona and finishing 19th in points. Unfortunately, MacDonald injured his neck during the next season, and was forced to sit out most of the year. MacDonald returned in 2002, and split the year between his own team and Troxell Racing, finishing 19th in points. He followed that up with another full-time bid in 2003, posting eleven top-20 runs and finishing a career-best 15th in points. He also made his return to the Busch Series, running five races and having a best finish of 22nd at Daytona.
In 2004, MacDonald made his last Truck race to date, finishing 21st at Daytona. He ran six more Busch races that year, posting a best finish of 24th at Pikes Peak. He made one start in 2005, and three in 2006, running twice for his own team and other for Jay Robinson Racing. In 2007, he made two starts, exiting both races with handling problems.
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