DockDoor
Window previews when you hover the Dock.
About DockDoor
DockDoor shows live window previews above Dock icons and adds a window switcher, bringing a Windows habit to the Mac.
Install DockDoor
Download it from the links above, or install it from the Terminal:
brew install --cask dockdoor Questions about DockDoor
Is DockDoor free?
Yes. DockDoor is free and open source. The source code is on GitHub at ejbills/DockDoor.
Where can I download DockDoor for Mac?
Download DockDoor from the developer's website (dockdoor.net) and GitHub. MacWorthy links only to official sources.
Can I install DockDoor from the Terminal?
Yes. With Homebrew, run brew install --cask dockdoor.
What are good alternatives to DockDoor?
Other windows & desktop apps for Mac worth a look are Rectangle (open source), Loop (open source), AltTab (open source) and Boring Notch (open source).
Other windows & desktop apps like DockDoor
Rectangle
Window snapping with keyboard shortcuts.
Loop
Window management with a radial menu.
AltTab
Windows-style alt-tab, with window previews.
Boring Notch
A free, open-source notch companion.
CoolDock
A second Dock built out of live widgets.
Dockaroo
A separate Dock for each display and Space.
Thaw
A free menu bar manager for recent macOS.
Magnet
Snap windows into place by dragging.