Apple’s Legal team used a MacBook, the Justice Department’s lawyers used a PC:

Both parties showed their evidence on a projector screen. Apple’s legal team used a MacBook to shuffle between evidence documents, stacking them side by side in split screens and zooming in on specific paragraphs.

In contrast, the Justice Department’s lawyers could show only one piece of evidence at a time. One video that Mr. Buterman played as evidence failed to produce the audio commentary needed to make his point.