SizeUp free download for Mac


18 June 2019

Quickly position a window to fill a designated part of your screen.


SizeUp allows you to quickly position a window to fill exactly half the screen (splitscreen), a quarter of the screen (quadrant), full screen, or centered via the menu bar or configurable system-wide shortcuts (hotkeys). Similar to "tiled windows" functionality available on other operating systems.

Additional features include moving windows from one monitor to another, from one Space to another, and restoring a window to its original size and position (SnapBack).

What's new in SizeUp

Version 1.7.4:
  • Support for macOS 10.14 Mojave.
  • Check for systems with broken AppleScript.
  • Microsoft Office windows not moving between Spaces.
  • "Third Lower" AppleScript action not working.

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28 SizeUp Reviews

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Rate this app:

14 March 2009

Most helpful

SizeUp is a great way to move program's windows around your monitor(s). There is no extra fluff to muddy the interface, and you can choose your own keyboard shortcuts. After using it a short while, I will no longer move my windows around any other way. The "Name your own price" pricing methodology is the most honest and flexible method I've seen. It brings shareware back the way it was intended to be! Double plus good all around!
Like (6)
Version 1.0
19 June 2019
Nice app. Does what it says. Looks good. And I love the developer. But I went with Spectacle, which is nearly identical in its basic functionality (doesn't offer margins, etc) but is completely free.
Version 1.7.4
11 November 2015
I bought this when it was first launched, and fast forward 2015 glad i did.. This is heaps better than divvy, the el capitan feeble attempt is a complete joke. What made me write this review was being delighted about how it also knows about multiple monitors, its allowed me to create a perfect workflow to keep focused with tonnes of apps open. I know better touch tool does all this stuff for free, but when i last used it it i noticed a performance impact on my old c2d.. Anyways... Simple and elegant to bring window management on par with windows 10. Nice one.
Like (2)
Version 1.6.2
15 July 2015
This program is much better than 10.11's split screen. Seems to work fine in it as well as 10.0. It is a great program.
Version 1.6.2
11 January 2013
When I begun to use a Mac, some months ago, I tested several window managers. SizeUp was my choice: it is a simple, well designed and stable app that do what promises. SizeUp does not bloat the system and you can even hide its menu bar icon. This app lets you define how the screen would be divided. For me, a nice setup is to use 100-0% of vertical space and 75-25% of horizontal. With this, I can use shortcuts to distribute bigger windows to left (as Safari or Together) and small ones to right (as Dictionary or Text Edit). When an application must use all screen room (as Photoshop or InDesign), there is also a shortcut to this. The only improvement I can see is to have two options regarding the center window command: one to just center the window, without any resizing, and other to resize it to a given measure. Today, SizeUp offers this two possibilities, but you chose one or other. To have both would be a good addition.
Like (2)
Version 1.5
21 September 2012
Excellent! Does what it promises to do, and does it flawlessly!
Version 1.4.1
29 April 2011
Excellent stable program to manage window sizes and placement.
Like (1)
Version 1.2.1
06 March 2011
Now we're just waiting for an update so that one may resize and move (later versions of) certain iLife/iWork apps around...
Version 1.2.1
04 February 2011
I'm in a desing/development shop and with my 27" imac there's lots of screen space so I en up with many many windows open. SizeUp makes it a little more sane to look at!
Like (1)
Version 1.2.1
21 January 2011
As a student, this software is amazing. Snapping a powerpoint presentation to one side of the screen and notes (or facebook :) to the other is priceless. Very stable and easy to use, seems like it should've been included with OSX in the first place.
Like (3)
Version 1.2.1
18 January 2011
Great software giving OS X the functionality from Windows 7. A must have for anyone using a big screen and wanting to view two documents side by side!
Like (1)
Version 1.2.1