Put any windows behind one tab strip
Browsers figured out tabs twenty years ago; the rest of your windows never got them. Scopo groups windows from any apps behind a single floating tab strip, so your editor, terminal, and docs can share one spot on screen.
Pro feature — see what's includedHow it works
Drop one window onto another
Drag a window by its tiling handle and drop it on the center of a tile, or onto any window's title bar. Instead of replacing the occupant, the two windows tab together. A preview shows the incoming window as a dotted ghost tab, so you see exactly where it will land before you let go.
Or pick from a list
Press Ctrl+Option+T on any window to open a picker of every other window on the screen, including windows already living in other tiles or groups. Pick one and it joins the group as the new active tab.
Switch like browser tabs
Click a tab, cycle with Option+Tab (add Shift to go backward), or jump straight to tab N with Ctrl+Option+1…9. Hover a tab to see a live thumbnail of the window behind it. Switching is instant, with no resize and no flicker.
Reorder, tear out, close
Drag a tab sideways to reorder it. Drag it out of the strip vertically to tear the window out; it becomes a free window you can drop anywhere, including onto another group's strip at a precise position. Each tab has its own close button, and it closes the window natively, save prompts included.
A group behaves like one window
Once windows are grouped, the strip is their shared window chrome. Drag the strip to move the whole group; grab its edges or corners to resize everything at once. Every member stays sized to the group, so switching tabs never reflows anything. The strip's own controls act on the whole group: minimize it to a single Dock icon, extend it to fill the screen (press again to put it back), or close every window in one click, with a confirmation unless you tell it to stop asking.
Groups work both inside a tiled layout, where a group occupies a single tile and splits and resizes like any other, and free-floating anywhere on screen. Drag a floating group onto a tile to dock it; extend or drag a tiled one out to free it. It works across multiple displays, too.
The tab strip stays honest: tab titles follow the live window titles, and each grouped window still shows up individually in the window switcher. Pick one there and Scopo brings up its group with the right tab selected.
Your groups survive restarts
Quit Scopo, reboot the Mac, reopen your apps, and your tab groups and tiling layouts come back, per Space, exactly where they were. Windows are re-matched to their seats as they reappear, so a group reassembles even when apps launch in a different order. You can also save a whole arrangement as a named workspace from the command bar and re-apply it any time.
Privacy still comes first: the layout file never stores window titles in plaintext (they're encrypted per Space), and hover thumbnails stay in memory, never written to disk.
Tips & tricks
Sideways vs. out
The strip reads your direction: a horizontal tab drag reorders, a vertical drag past the rail tears the window out. You can even bail out of a reorder mid-drag by pulling down.
Minimize keeps its seat
Minimizing one window of a group (Cmd+M) dims its tab instead of evicting it. Click the dimmed tab, or reopen it from the Dock, and it slides back into place.
Make the shortcuts yours
Add-to-group, cycle, and jump-to-tab chords are all rebindable in Settings → Tiling → Tabbed Windows, along with a toggle for the close-all confirmation.
Ready to try Tabbed Windows?
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macOS 13+ required