Is there a way to remove the gap between window edge and the screen edge when the Dock is hidden?

Solution 1:

Not yet (as of macOS Sierra 10.12.6). When hiding the dock, the OS still leaves ~4 pixels of visible space presumably reserved for some part of the dock behavior. Third party window resizing doesn't seem to help either. Creator fifafu of BetterTouchTool wrote:

You mean the gap when the dock is hidden? Unfortunately this is a limitation given by the system :-(. I haven't found a way to workaround that.

Note: This is more noticeable on lower resolution external displays (4px on a retina display is barely visible).

Some workarounds:

• Move the window over the visible pixels, then drag from the opposite side (but also notice the additional delay in showing the dock)
• Use an external display and set a different monitor as primary (drag the white menubar in the display arrangement in sys prefs), allowing full sizing on the non-primary display.

Related Apple SE but for visible docks: Force windows to be maximized but not fullscreen?

Have others noticed? Yes, lots. Macrumors dead ends:

https://forums.macrumors.com/threads/bottom-dead-space-with-automatic-hidden-dock.1716910/ https://forums.macrumors.com/threads/hiding-dock-still-leaves-a-few-pixels-unused.1208427/ https://forums.macrumors.com/threads/how-to-remove-space-between-window-and-dock.1094679/ https://forums.macrumors.com/threads/hidden-dock-small-space-in-the-bottom-of-the-screen.931858/

It's even caused bug reports for OS X app developers:

https://github.com/eczarny/spectacle/issues/555 https://github.com/fifafu/BetterTouchTool/issues/672
https://github.com/search?q=mac+dock+gap&type=Issues&utf8=%E2%9C%93

I'll add that this issue exists vertically as well:

Manual workaround