Download Mac Front and Center 1.2.6 Full Version – FREE!
Front and Center lets you control the window layering policy on your Mac. In “Classic” mode, clicking on a window brings all the windows in that app to the front, just like it did in classic Mac OS. In “Modern” mode, only the clicked window comes to the front. In either mode, Shift-click on a window to get the opposite of the chosen behavior.
Compatibility: macOS 10.12 or later
Mac App Store: https://apps.apple.com/app/front-and-center/id1493996622