WindowSwitcher 2 has been rewritten from scratch for recent versions of macOS. One keyboard shortcut puts every open window in front of you: large cards, each with a thumbnail of the window, the app icon and the title. Press Enter and you are in the one you picked.
Narrow the overview to a single app with one key, or just start typing: search by window title is new in this version. The overview, the filter and the search all live on one screen, so the window you want turns up faster. And the app is now free.
Why the overview works this way
Which window you need is a different question every time, and the answer depends on how many are open right now. With a few, your eyes are quickest: you recognise a window by the look of it without reading anything. That is why the cards are large and carry a thumbnail instead of being a list of lines.
With many similar windows, looking stops helping, and typing two letters from the title clears the rest away. That is why the search has no field to click into. And when you already know the window belongs to your mail app, one key puts you in that app's tab. The three ways are not three modes: you can switch a tab, then type a letter, then pick with the arrow keys, all on the same screen.
Two keys to the window you just left
When the overview opens, the window already selected is not the one you are in. It is the one you were in before. Option-Tab, Enter, and you are back. Going back and forth between two windows is most of what switching is, and it now costs two keys.
Finding the right one
There are three ways to find the window you want, and you can mix them.
You can look: each card shows a thumbnail, so you pick the window you recognise instead of reading titles that all say "Untitled". You can type: there is no search field to click into, you just start typing, and the windows filter by title and by app name in any keyboard layout. Or you can switch tabs: along the top are "All" and your apps in the order you used them last, and Tab and Shift-Tab move between them.
The first nine cards carry a number. Press 1 to 9 and you are in that window without selecting it first.
Windows that are not in front of you
Windows from other desktops and full-screen windows are in the overview too, marked with a badge; switching to one takes you to its desktop. Minimized and hidden windows are off by default. Turn on "Show hidden and minimized windows" in Settings and they join the grid. On more than one monitor, the overview opens on the screen your pointer is on.
What it asks for
Two system permissions, and a three-step guide walks you through both on first launch. Accessibility, so the keyboard shortcut works at all. Screen Recording, so the cards can show thumbnails. Without it the overview still opens, the cards just have no pictures. The app lives in the menu bar and puts no icon in the Dock.
If you want more
This app answers "which window" from the keyboard. If you would rather get there from the Dock, hovering an icon to see live previews of that app's windows and act on them, that is DockView 2, and it is a paid app.
WindowSwitcher 2 runs on macOS 14.6 and later, and it is free. The download button is on the WindowSwitcher page.