Split

Split is a tiny Mac menu-bar app for working with two windows side by side. Pair them, drag one linked divider, and both windows resize together. You can also swap the two sides with one click. Built-in macOS Split View only links windows in fullscreen. On the regular desktop, side-by-side windows do not resize together. Split is for that gap. It is narrower than Rectangle: it focuses on two-window pairing, linked resize, and swap, not a full tiling system. Buy once for $4.99 USD on the website. One Mac activation at a time. Updates included. No subscription. No trial yet. macOS 13 or later, Apple silicon and Intel. Signed and notarized. Updates via Sparkle. Needs Accessibility permission. No ads, no analytics. Window info stays on your Mac. Works on the current screen only, not Spaces. Install from the website after purchase. Menu-bar only.