I Built a Windows-Style Alt+Tab Window Switcher for macOS in Pure Swift

One of my biggest frustrations after spending years on Windows was the loss of a proper window switcher when I moved to macOS. Cmd-Tab switches between applications, not windows. If you have four Terminal windows open, you cannot directly jump to a specific one — you have to Cmd-Tab to Terminal, then use Cmd-` to cycle through its windows. It is a two-step dance every time. So I built AltTab — a lightweight, zero-dependency macOS utility that brings back the Windows Alt-Tab experience using Option-Tab. What It Does Hold Option and tap Tab — a panel appears showing thumbnails of every open window across all your apps. Cycle through them with Tab / Shift-Tab or the arrow keys, then release Option to jump straight to the selected window. Click any thumbnail to switch instantly. Shortcut Action Option-Tab Open switcher / next window Tab Cycle forward Shift-Tab Cycle backward ← / → Navigate left / right Escape Cancel Enter Confirm and switch Click Select and switch immediately Minimized win