Software & Apps

How To Find the DPI of Images on a Mac

Have you ever printed an image from your Mac and felt disappointed at the image’s poor resolution on print? Two phenomena describe the resolution of an image and how sharp the image looks on the web or print; Dots Per Inch (DPI) and Pixels Per Inch (PPI)

Both terms are used interchangeably, but DPI commonly comes up when you need to check an image’s resolution for printing purposes. So how do you find the DPI of an image on a Mac?

Quick Answer

You can find the DPI of an image on Mac in two primary ways; using the Preview app and Adobe Photoshop. The former is free, while the latter is a paid-for photo editor with cool features worth every penny.

This article highlights the significance of DPI in computing and design and the step-by-step process of finding the DPI of an image on Mac using the methods mentioned above.

What Is DPI, and Why Does It Matter?

As earlier mentioned, DPI is an acronym for Dots Per Inch, and it determines the quality, clarity, and resolution of an image. A higher value of DPI means the Image is of high quality and vice versa. If you want your image to look good on both digital display and print, you need to ensure it has the optimum DPI. 

Let’s look at the two methods to find the DPI of an image on a Mac.

Method #1: Using The Preview App

All Macs come with an inbuilt Preview App that has features for viewing and editing images and PDF files. Follow these steps to find the DPI of an image using this app:

  1. Open the file location to view the image.
  2. Right-click on the image. A dialogue box appears.
  3. Scroll through the options and select “Open With.”
  4. Another dialogue box opens. Click on “Preview.”
  5. On the “Preview” menu bar, tap on “Tools.”
  6. Under “Tools,” select “Show Inspector.”
  7. Click on “General Information.” You can locate the DPI of the selected Image on the details on display.

Method #2: Using Adobe Photoshop

Adobe Photoshop is a premium photo-editing and design software that allows you to create beautiful paintings, graphics, etc. Although the software is a paid-for service, you can access its premium features through its seven-day trial. Download the app on your Mac, then follow these steps to find the DPI of your Image:

  1. Open the selected image on Adobe Photoshop.
  2. On the Menu bar, select “Image.”
  3. Scroll down the options under Image and tap on “Image Size.”
  4. Locate the “Image Resolution” under the details on display. The “Image Resolution” figure is your image’s DPI.

How To Change the DPI of an Image on Mac

Do you want the DPI of an image from 72 to 300 or any other value? You can change the DPI of a photo on a Mac using two methods; the preview app or Adobe Photoshop.

Follow these steps to change the DPI of an image on Mac using Preview:

  1. Open the image on the “Preview” app.
  2. Select “Tools.”
  3. Scroll down the menu and tap “Adjust Size.”
  4. Uncheck the “Resample” image box. 
  5. In the resolution box, type in your preferred DPI value.
  6. Click “OK.”
  7. Navigate to “File on the menu bar and click “Save.” The DPI of your image is now changed.

To change the DPI of a photo to 300 using Adobe photoshop, follow these steps:

  1. Open the selected image on Adobe Photoshop.
  2. Select “Image.”
  3. On the drop-down menu, tap on “Image Size.”
  4. Uncheck the “Resample” box.
  5. Key in your preferred DPI value in the resolution box.
  6. Tap “OK.”
  7. Click on “File” on the main menu and select “Save” on the drop-down menu. Your image has a new DPI value now.

Conclusion

The DPI of an image is vital, especially if the Image in question is for print purposes. The higher the DPI, the better the resolution and quality of an image and vice versa. You can check the DPI of an image using the inbuilt Preview App or a third party photo-editor such as Adobe Photoshop.

Frequently Asked Questions

Can I change 72 DPI to 300 DPI?

Yes, you can. Both the Preview app and Adobe Photoshop allow you to change the DPI of your Image. Check out the steps highlighted above to change the DPI of your Image.

Can an iPhone shoot 300 DPI?

No, it can’t. An iPhone can’t shoot a 300 DPI image, but it produces images with high megapixels. You can then change the resolution or DPI of these images to 300 by following the steps we highlighted previously in this article.

Why is it important to have images at 300 DPI?

300 is the recommended DPI for printed images in magazines, newspapers, and artwork. This value is essential because it is the minimum resolution that the naked eye can blend the different colors to make a crisp and non-pixelated image.

How do I change the printer DPI on Mac?

To change the printer DPI on Mac, follow these steps:

1. Right-click on the image.
2. Click on “Tools.”
3. Select “Adjust Size.”
4. Uncheck the “Resample” box.
5. Key in your preferred DPI value.
6. Click “OK.”
7. Navigate to the main menu and click on “File,” then “Save.”

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