When Windows 7 came out, one of its most interesting features was Aero Snap, which allowed you to pin windows side by side on your screen. Mac users, don’t despair. You weren’t left out and forgotten. Thanks to Irradiated Software, managing multiple windows on your screen is an absolute breeze.

Cinch: The Drag and Release Method

With Cinch, the app allows you to drag windows to either side of your screen to “cinch” it into place. For example, if you want to move your browser to occupy the right side of the screen, just drag the window over to the right side of your screen until you see a dotted line appear outlining one half of the screen. Once you release, the window will get resized to fit that part of the screen. The app works best if you drag windows by its title bar.

On the other hand, dragging your window to the top of your screen will automatically resize it to fit the entire screen.

To un-cinch your window, simply drag and release the window from its current position, and it will revert back to its original size.

Check out this video demonstration of Cinch. Ignore the part where it said that it is launching soon…the app is already available:

The Multiple Monitors Issue

For those who use multiple monitors, Cinch won’t be as effective due to the new set of boundaries formed by the extra monitors. For example, if you are using 2 monitors, dragging a window on your right-view monitor to the right side of the screen will result in the window moving to the next monitor. If you want to activate Cinch, you would need you to drag the window much slower to the edge for it to work.

To fix this, you need to head over to your System Preferences. Then go to Display > Arrangement Tab and make the changes according to the screenshot shown below:

According to Irradiated Software, this arrangement will allow you to trigger Cinch normally by dragging it to the upper right of the main screen or the bottom left of the external monitor.

The Spaces Issue

If you have Spaces enabled on your Mac, a similar issue will arise with Cinch when you use multiple monitors. The trick to avoid having your window pushed to another “space” is to release the window before Spaces gets triggered. This happens whenever you hold the window to one side of your screen for longer than a second. You can also change the time it takes for Spaces to take effect by downloading a free application called Warp. Alternatively, Irradiated Software offers a manual method instead on their website.

Sizeup: For those who have abandoned their mouse

Unlike Cinch, Sizeup utilizes keyboard shortcuts to manage your windows. Furthermore, you can arrange your windows in more ways besides just pinning windows to two halves of the screen. For example, you can pin windows to quarter sections of the screen, send the window to different Spaces, and center windows. If you’re not like me and have a gigantic 27” monitor, you can also adjust the partitions to fit multiple windows in one place.


If you prefer to use a mouse, Cinch is for you. If you work exclusively from your keyboard instead, Sizeup is the better choice. Both apps perform very simple tasks but go a long way to helping you organize your workspace. I like to utilize Cinch for snapping two files to each half of my screen whenever I edit some code. This helps me quickly go back and forth to each file without the painful task of minimizing and sorting through countless windows.

Cinch can be downloaded for $7 or for free if you don’t mind the occasional message asking you to buy it. Sizeup will cost you $13.