Apple provides one clue in macOS as to which of many windows you may see on screen is the current frontmost fighting one : the “ traffic light ” reddish , yellow , and green button for near , minimize , and resize are lit up in colour . That ’s it . you may use Mission Control ( F3 ) to shrink all windows to fit across your display , but it does n’t render clue about the participating one .
The only solution is an inexpensive third - party app , HazeOver , which is$5.99 on the App Store . It ’s a exclusive - purpose app with many preferences and keystrokes you may habituate to customize how it identifies active window and for how long .
In HazeOver ’s most basic configuration , to highlight the active windowpane and blind all the rest :
Set Highlight to a single window.
To toggle the focus state , you could utilize the default keystroke Command - Control - Option - H. This can be customized inHazeOver > configurations > Shortcuts .
This Mac 911 article is in response to a head present by Macworld reader Chris .
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Opt to dim all but one window on a single display.
