Is there a way I can get this behavior on Mac OS?
alt + right-click-drag will resize the window, relative to where you've clicked within the window and the window's center
alt + left-click-drag will move the window, regardless of where you've clicked within the window.
There's a Windows port of this behavior as well: http://www.codeproject.com/KB/DLL/wm.aspx
Easy Move+Resize is a free and open source tool that does exactly that. I tested it first on El Capitan (update from 2022: it still works on Monterey).
Cmd + Ctrl + Left Mouse - anywhere inside a window, then drag to move
Cmd + Ctrl + Right Mouse - anywhere inside a window, then drag to resize
BetterTouchTool lets you do this. It's quite handy!
In BTT's prefs, click on the Settings button, the three dots at the top right.
Then select the "Window Snapping and Moving" item in the sidebar.
Tick the tickboxes for the keys you want to hold down for Moving and Resizing.
I selected all three: move, resize, and FN.
When I hold Function+Control the focused window will move when I slide around on the trackpad.
When I hold Function+Option the focused window will resize when I slide around on the trackpad.
I tested this on my macbook pro, OS X 10.6.5.
Note that you may get this message first time you try to actually move or resize a window:
Click "Launch it for me!", then check the box for "Enable access for assistive devices" - you're in business.
I found this the other day, might be useful:
Although not Alt + left-click-drag but this would give you Ctrl + Cmd + Click natively (High Sierra or later), no 3rd party app required:
Run this command in terminal to enable Ctrl + Cmd + Click in any window to move. Restart after.
# to add
defaults write -g NSWindowShouldDragOnGesture -bool true
Run this command in terminal to remove this functionality. Restart after.
# to remove
defaults delete -g NSWindowShouldDragOnGesture
sourced from http://www.mackungfu.org/UsabilityhackClickdraganywhereinmacOSwindowstomovethem
https://github.com/finestructure/Hummingbird is open source software with paid version for support.
Installing instructions:
brew tap finestructure/Hummingbird
brew install --cask Hummingbird
Tried them all and they are not as good as Flexiglass.
Try holding fn + option and then move your mouse (10.6.4 2010 MBP)
My old mac used to do it using just option key along (10.6.2 MBA)
Oh and try the window snapping function on BetterTouchTool. If you've not used that app, its the greatest thing to happen to Apple Trackpads (and Magic Mouse) > lets you configure over 40+ different gestures to lots of different commands!
And its free too
With the Afloat utility installed, holding control+Command moves a window.
