by: OSXDaily

MacOS has evolved with some powerful window resizing features, including automatic window resizing capabilities that were introduced in newer versions of MacOS system software. These automatic window resizing functions will activate when dragging windows around on the Mac screen, and will either attempt to tile windows, resize windows, or make windows fill the screen, depending on where or how you are dragging a window to.
Like just about every feature in MacOS, some Mac users absolutely love these capabilities, while others are less unenthusiastic or even annoyed by the automatic window resizing. Usually the Mac users who do not like the automatic window resizing features find them accidentally activating and frustrating, and thus they might wish to disable the capabilities.
If you’d like to turn off the automatic window resizing features in MacOS, read along. These window resizing features are in MacOS Tahoe and MacOS Sequoia onward, so earlier versions of MacOS will not apply here.