A .DMG file is a container file commonly used to distribute applications for Mac OS X. Installing software from one of these requires you to mount the image and move its contents to your computer’s “Applications” directory.

One of the most common mistakes I see among new Mac users is fumbling with how to install and open .dmg files or new software. The process for installing new applications on your Mac can be confusing at first because it differs greatly from Windows’ software installation process. Nevertheless, the Mac method of installing software is actually quite simple and intuitive once you are accustomed to it. If your desktop is littered with DMG files and white “drive”-looking icons, read on!

Contents

What are .DMG Files?

DMG Master is a document based app to create standard Disk Image Archive with just one click. Disk Image Archive is the universal standard on macOS to distribute your content packed in a single file. It is recognised by any Mac and can be opened on any Mac without any software. Mac users interested in Tool to combine multiple dmg files generally download: Little Disc+ 3 (Trial) 3.4 Little Disc+ is a Mac application that handles file archives and disc images comprehensively. A DMG file is 'mounted' as a drive and is treated by the operating system as if it were a physical hard drive, making it really easy to view its contents. Joined Oct 1, 2007 Messages 7,163 Reaction score 275 Points 83 Location UK Your Mac's Specs Mac Mini i5 (2014 High Sierra), iPhone X, Apple Watch, iPad Pro 12.9, AppleTV (4).

DMG stands for Disk Image, and is a format commonly used to distribute files and applications among Apple computers. A DMG file is like a virtual DVD or hard drive. They can be “mounted” on your Mac in order to work with their contents, or even burned to an actual physical disc.

In order to understand the concept of a DMG disk image, think of a storage volume such as a CD, DVD, hard drive, or external drive. A DMG file is like one of these devices in that it serves as a means to encapsulate documents, images, software, and other files. The difference is that with a DMG, there is no physical storage medium. There is only the DMG file, which can be written to a hard drive, burned to a CD or DVD, or sent over the Internet.

In order to work with the contents of a DMG file, you must mount the the disk image to your system. This may sound daunting, however “mounting” a DMG file with Mac OS X is no more complicated than double-clicking it’ icon. The operating system will load the load image and place a new icon both on your desktop, and in the sidebar of the Finder. The icon will have the same name as the DMG, and you’ll be able to browse through its contents like any other folder.

Once you are done working with the contents of the file, you will want to remove or “unmount” it from your system. Do this by opening the Finder and clicking the eject icon next to the virtual drive’s icon. Or, go to the Desktop, click once on the icon, and press CMD+E.

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How to Install and Open .dmg Files on a Mac

Software installation with Mac OS X is very different than in the Windows world. On a Windows PC you run an installer, tick off a few checkboxes, and wait for the progress meter to reach completion. There usually is no such “installation wizard” on a Mac &emdash; you simply drag and drop the program into your computer’s “Applications” directory. The trick is that most Mac applications are distributed as images called DMG files, and many new Mac users end up running applications directly from the image instead of installing them to the “Applications” directory.

Enough explanation, here’s how to install an OS X app from a DMG file:

1. Find the downloaded file, which usually ends up in your Desktop or Downloads folder.
2. Double-click the .DMG file to mount it. A new Finder window showing its contents should appear.
3. If the window also contains a shortcut icon to “Applications”, drag and drop the app onto the shortcut.
4. If not, double-click the mounted volume on your desktop and drag the app icon from there to the “Applications” icon in the Finder sidebar.

Further Explanation

Alright, that was the abridged version. Here’s the long version. I’ve just downloaded the DeskLickr application, and the DeskLickr_1.2.dmg is sitting on my desktop. I double-click it and a new icon labeled “DeskLickr 1.2” appears on my desktop. Here’s what my desktop looks like at this point:

Since most of the time a new Finder window also pops up when the image is ready for use, this one is now sitting on my desktop:

Different applications are going to show you slightly different Finder windows. Each application’s designers like to add their own artwork. Glitter aside, most applications are trying to tell you the same thing. See the arrow pointing from the DeskLickr icon to the “Applications’ shortcut? It’s telling you to drag and drop the icon into that folder. Once you’ve done so, the app will be installed.

If a program doesn’t provide a shortcut to the Applications folder, you’ll need to pop open a new Finder window. Press CMD+N to open a new window, then drag the program over to “Applications” in the left-hand side of the window.

Also useful: How to CTRL + ALT + DEL on a Mac

House Cleaning

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Once the new program is installed it’s time to do some house cleaning. You no longer need the disk image you downloaded, so follow these steps:

1. Close any Finder windows that have been left open.
2. Eject the disk image (not the .DMG file). Click on its desktop icon, then press CMD+E.
3. Delete the .DMG file by dragging it to the trash.

That’s it! Your new Mac application is ready to use. But wait…

Bonus Tip: Add Your New Application to the Dock

I knew you were going to ask, so I figured I would cut you off at the pass. In order to add the new application to the dock, follow these steps:

1. Open up a new Finder window.
2. Click on “Applications”.
3. Locate your new program’s icon.
4. Drag the icon to your Dock, and drop it wherever you like.

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Working with PDFs can be tricky, especially if you're trying to merge multiple documents together. Maybe you're constructing a portfolio, or maybe you just want to reduce file clutter. Whatever the reason, it can be confusing to keep lots of documents straight, but it's also tricky to figure out how to bring them together.

© Rob Lightner

Any Way To Combine .dmg Files Without

Step 1 - Download PDFBinder.

One of the most popular tools for combining PDFs is Adobe Acrobat, but that software will cost you at least $13 a month for a subscription. Luckily, there are a few other ways you can combine PDFs for free, no matter what type of computer you're using.

Here's how to combine multiple PDFs for free, whether you're working on a Windows device or a Mac. (We've also got tricks for how to easily sign PDFs, and four free apps for better PDF editing.)

How to combine PDFs on Windows

If you're using Windows, you'll need a third-party app to help you combine PDFs. We tested a few, and found a solid option in PDF Merger & Splitter by AnywaySoft. It's available through the Microsoft Store for free.

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Here's how to merge PDFs with this app:

• Open the app, and choose Merge or Split. If you just need to merge two documents without changing the order of any pages, choose Merge.
• Click Add PDFs, and select however many you want to merge. You have the option to move them up or down, or sort by name. You can also preview what the merged documents will look like.
• Once your documents are in order, hit Merge, and name and save the new merged PDF.

If you want to customize your merger a bit more, such as by changing the order of pages or only adding in certain parts of each PDF, you'll have to split them first. To do that, select Split when the app opens. Choose which individual pages or page ranges you want to pull out. You can save them as one PDF, or as individual PDFs.

How to combine PDFs on Mac

Any Way To Combine .dmg Files

On Mac, you can combine PDFs with a built-in tool found in Preview, according to Apple Support.

Here's how to combine two PDFs:

• Open a PDF in Preview.
• Go to View > Thumbnails. You'll see page thumbnails in the sidebar.
• Select the thumbnail for the page where you want to insert the other document.
• Click Edit > Insert > Page from File (if the Page from File selection is dimmed so you can't click it, make sure that the file you have open is a PDF. Some encrypted PDF documents can't be merged, according to Apple . Check the permissions of a PDF by choosing Tools > Show Inspector, then click the lock icon).
• Select the PDF you want to add, and click Open.
• Choose File > Export as PDF to save.

And here's how to combine parts of one PDF with another PDF:

• Open the PDFs you want to combine in Preview.
• In each document, choose View > Thumbnails. You'll see page thumbnails in the sidebar.
• Press and hold the Command key, and select the page thumbnails that you want to add to the other document. Let go of the Command key.
• Drag the selected thumbnails to the sidebar of the other PDF, and release where you want them to go. (If you have macOS Sierra or earlier, drag the thumbnails directly into a thumbnail in the other PDF.)

You can rotate, delete and reorder pages from the thumbnail section, too.

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Now that you've mastered combining all of your PDFs, make sure to check out other hidden Mac tips and secret Windows 10 tips, and how to download Windows 10 and Microsoft Office apps for free.