I'm using a Macbook Pro Early 2015 running Mac OS X El Capitan.

I'd like to measure the resolution (or at least the aspect ratio) of a specific application window on Mac OS X. Is there a way to do this? The reason I need to do this, is to ensure that I am running the application window at a specific resolution, or aspect ratio.


You can do that with Accessibility Inspector, Xscope or via applescript "get the bounds of the front window"


Check out the SizeUp utility for Mac OS X -- this seems to work well for me.


Screenshot of SizeUp

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