John D. Carmack II is born in Shawnee Mission, Kansas, to Stan Carmack, a local television news reporter, and Deanna Carmack.

Demonstrates a precocious interest in electronics and computers. Begins building and tinkering with various electronic components.

Carmack uses an Apple II computer where he learns to program. Becomes engrossed in software development. Demonstrates a talent for reverse engineering and modifying existing programs, including video games. He also creates simple games during this period.

In his youth, Carmack was involved in a scheme to break into Apple II computers at his school, resulting in a court-ordered year of probation. This event, while a setback, highlights his early programming skills and unorthodox approach.

Carmack struggles with traditional schooling, finding it unchallenging and preferring to pursue his own interests in computer programming. His academic performance reflects his lack of engagement with the standard curriculum, focusing instead on his passion for technology.