Mackenzie has recently returned to performing after taking time off to concentrate on her education. Mackenzie has been performing since age four. She appeared in numerous television shows including Nurse Jackie (6 years-series regular), Hawaii Five-O, Criminal Minds, Grey's Anatomy, Parenthood, About A Boy, The Middle, All My Children, Workaholics, and CSI: Miami. She also performed in the National Tour of Annie portraying the character Molly. The highlight of the tour was playing in her hometown, Los Angeles, at The Kodak Theater. She made her film debut in the film The Lincoln Lawyer (2011). Mackenzie was home schooled until high school. In high school she was a part of the dance team, a varsity cheerleader and senior class president. She graduated from The University of Alabama, making the President's list all 8 semesters. Her time away from the business has given her insight into the human condition that enhances her ability to embody a character.