HaloSwitch
Hold the middle mouse button and your open apps fan out round the pointer
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Anyone who splits work across macOS desktops stops scrolling past windows that live somewhere else entirely.
Debut takes over Command-Tab and shows window previews for the desktop you are on, grouped by space. Option-Tab opens the wider view: every window everywhere, with windows draggable between spaces and no sliding animation. GPL-3.0, 640 commits, Swift, free as a direct DMG from the repo. It needs macOS 26 on Apple Silicon and accessibility permission, and macOS 27 to add, remove or merge desktops. Four stars so far, and the maker goes by a GitHub handle whose bio lists GoodNotes.
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