tl;dr: A workaround for cursor lag on the new MacBook (likely related to ProMotion/variable refresh behavior) by running a tiny background app that continuously captures a 1x1 pixel region of the screen every 10 seconds via ScreenCaptureKit, forcing the display into a higher refresh state. The provided bash script compiles a Swift menu bar app ("Unlag Neo") that handles permissions, login-at-startup, and optional pausing during fullscreen apps. Frames are immediately discarded; the capture exists solely as a side effect to keep the cursor responsive.