She was born on 9th of July in 1996 in Holland, Pennsylvania. She was obsessed with making videos when she found her parents video camera at the age of 8. After moving out to California, she began online schooling.
After her announcement to stay in Los Angeles, there were rumor that she dropped out of the college but she cleared the rumor by saying that she was a good student who never failed in the class and was counted under the honorable students of the class; but she said that we would like to have a business degree from a college in near future.
In August 2014, the Teen Choice Awards nominated Mc Allister for not only "Choice Web Star: Comedy" , but also for "Choice Web Collaboration" for the video "Fab Five in Real Life", which she filmed with Anthony "Lohanthony" Quintal, Jack "That So Jack" Baran, Andrew Lowe, and Rebecca Black.
My Collab ended after issues arose between supermac18 and Dalton.
Jenn Mc Allister was born with the birth name Jennifer Ann Mc Allister.
Mc Allister has three channels on You Tube, jennxpenn (her main channel), jennxpenngames (as the name suggests, her gaming channel), and jenn (her vlog channel).
She has over 184 million video views, which continues to increase.
My Collab was created by youtube supermac18 and other members like mutantboyfriend (Jonah Green), Ohitsdalton, imdaviddalen (not active) and TCProductions X (which is no longer active) but was sadly ended when issues arose between Dalton and supermac18.