Grab Utility Mac Screenshots: Step-by-Step Guide

This guide shows you how to use the Grab utility on macOS to take screenshots of your entire screen, a selected window, or a specific area. Grab was the built-in screenshot tool before the newer Screenshot app, but it still works on many Macs and offers a few unique features. You’ll learn each capture mode, how to save your images, and what to do if something doesn’t work as expected.

What You’ll Need

A Mac running macOS (Grab is available from OS X 10.4 through macOS 10.14; on newer versions, it may be hidden or replaced by the Screenshot app).
Access to the Utilities folder (Finder > Applications > Utilities).
If you’re using macOS Mojave (10.14) or later, you may need to use the Screenshot app instead, as Grab was removed in Catalina (10.15).

Step-by-Step

Open Grab. Go to Finder, click on Applications in the sidebar, then open the Utilities folder. Double-click Grab. If you can’t find it, use Spotlight (press Cmd + Space) and type “Grab” to search.
Understand the menu bar. When Grab opens, it appears as a small window with the word “Grab” in the menu bar at the top of your screen. The main options are under the Capture menu. You’ll see four choices: Selection, Window, Screen, and Timed Screen.
Take a selection screenshot. Click Capture > Selection (or press Shift + Cmd + A). Your cursor will turn into a crosshair. Click and drag to select the area you want to capture, then release the mouse button. A new window will open with your screenshot.
Capture a specific window. Choose Capture > Window (or press Shift + Cmd + W). A message will appear telling you to click the window you want to capture. Click anywhere inside the window (not the title bar) to capture it. The window will be captured with a drop shadow by default.
Take a full-screen screenshot. Select Capture > Screen (or press Shift + Cmd + Z). Grab will wait a few seconds (you’ll hear a countdown beep) and then capture the entire screen. If you have multiple monitors, it captures the screen where Grab is active.
Use the timed screen capture. Choose Capture > Timed Screen (or press Shift + Cmd + T). A dialog box will appear with a timer. Click the Start Timer button, and Grab will count down from 10 seconds before capturing the full screen. This is useful for capturing menus or actions that require setup.
Save your screenshot. After any capture, a new window will show the image. Go to File > Save (or press Cmd + S). Choose a location, enter a filename, and select a format (PNG, TIFF, JPEG, or GIF). Click Save.
Copy to clipboard (optional). If you want to paste the screenshot directly into an email or document, go to Edit > Copy (or press Cmd + C) while the screenshot window is active, then paste elsewhere.
Quit Grab. When you’re done, press Cmd + Q or go to Grab > Quit Grab.

Common Mistakes

Clicking the wrong window: In Window mode, clicking the desktop or a menu bar item may capture the wrong thing. Make sure you click directly on the window’s content area.
Forgetting to save: Grab does not automatically save screenshots. If you close the preview window without saving, the image is lost.
Using Grab on macOS Catalina or later: Grab is not included in macOS 10.15 or later. If you can’t find it, use the built-in Screenshot app (Shift + Cmd + 5) instead.
Not noticing the timer: For Screen and Timed Screen, there’s a delay. If you click and immediately try to interact with the screen, you might capture the wrong moment.

Tips

To capture a window without its shadow, hold down the Option key while clicking the window in Window mode. The shadow is removed from the final image.
Use Timed Screen when you need to open a menu or position the mouse before the capture happens. The 10-second countdown gives you time to set up.
If you need to capture a specific area repeatedly, use Selection mode and remember the coordinates. You can also use the crosshair to measure the pixel dimensions.
For quick captures, use the keyboard shortcuts directly: Shift+Cmd+A (selection), Shift+Cmd+W (window), Shift+Cmd+Z (screen), Shift+Cmd+T (timed).
If you’re on a newer Mac, learn the Screenshot app (Shift+Cmd+5) as it offers more options like recording video and saving directly to a file.

Troubleshooting

Grab won’t open or is not found. If you’re on macOS Catalina (10.15) or later, Grab has been removed. Use the Screenshot app instead (press Shift+Cmd+5). If you’re on an older system and Grab is missing, check that it hasn’t been moved or deleted. You can reinstall it from the macOS installer or use the Terminal command open /Applications/Utilities/Grab.app if it exists.

The screenshot is blank or black. This can happen if you’re trying to capture a protected window (like DRM content) or if your screen is locked. Make sure your display is not in sleep mode and that you’re not trying to capture a secure window.

The timer doesn’t start. In Timed Screen mode, you must click the Start Timer button. If you just close the dialog, nothing happens. Also, make sure Grab is the active application.

I can’t paste the screenshot. If you copied the image, make sure you’re pasting into an app that supports images (like Pages, TextEdit, or an email). Some apps only accept text.

The screenshot is too large or too small. Grab captures at the screen’s resolution. If you need a different size, you’ll need to resize the image afterward in Preview or another editor.

Frequently Asked Questions

Does Grab work on macOS Big Sur or newer?

No. Grab was removed after macOS Mojave (10.14). On newer versions, use the Screenshot app (Shift+Cmd+5) which has similar and more advanced features.

Can I change the default save format in Grab?

No, Grab doesn’t have a setting for default format. You choose the format each time you save. If you want a consistent format, use the Screenshot app or a third-party tool.

How do I capture only a menu or a dropdown list?

Use Timed Screen (Shift+Cmd+T). Start the timer, then click the menu to open it before the countdown ends. The capture will include the open menu.

Why does my screenshot have a shadow around the window?

By default, Grab adds a drop shadow to window captures. To remove it, hold the Option key while clicking the window in Window mode.

Can I take screenshots without opening Grab?

Yes, you can use the keyboard shortcuts directly if Grab is running in the background. But on modern macOS, the built-in shortcuts (Shift+Cmd+3 for full screen, Shift+Cmd+4 for selection) work without any app.

Where does Grab save screenshots by default?

Grab does not save automatically. You must manually save each capture using File > Save. If you don’t save, the image is lost when you close the window.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

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