Apple introduces various features to customize user experience in its operating systems. One of these customizations is the ability to set a default preview image extension. This article will guide you through the process of setting the default preview image extension to jpg on your iMac (Late 2013) running Sonoma (14.7).
Why Change the Default Preview Image Extension
There are various reasons why you may want to change the default preview image extension. For instance, you may have observed that your iMac has been recently using the .jpeg extension instead of the more common .jpg extension. This change can cause compatibility issues when sharing files with other devices or applications, making it essential to set your preferred default preview image extension.
Understanding Default Preview Image Extensions
When you open a folder containing image files, the system uses a default preview image extension to determine the thumbnail images to display. Typically, macOS systems use the .jpg extension as the default preview image format, but other image file formats, such as .png, .tiff, or .gif, can also be set as the default.
The Evolution of Image File Formats
Understanding the evolution of image file formats is essential to grasping why changing the default preview image extension matters. For instance, .jpg (Joint Photographic Experts Group) files are lossy compressed image files, while .jpeg (JPEG Interchange Format) files have metadata associated with them.
Older Mac systems (before OS X) used the .jpeg format as the default. However, newer systems reverted back to the more common .jpg format. This difference in default image formats can cause compatibility issues when sharing files between older and newer Mac systems.
Thus, changing the default preview image extension can help resolve these issues, ensuring a smoother sharing experience between different systems.
Setting a Default Preview Image Extension on iMac (Late 2013) Running Sonoma (14.7)
To change your default preview image extension to .jpg on your iMac, follow these steps:
- Open a new Finder window on your iMac.
- Click on the Finder menu in the top left corner, and then click "Preferences."
- In the General preferences pane, click on the drop-down menu next to "New Finder windows show" and select "One of the following:"
- From the list on the right, scroll down to "Images" and click on it.
- In the Images folder that appears, find the jpg option, select it, and then close the Finder preferences window.
After completing these steps, your iMac (Late 2013) will display thumbnails of image files using the .jpg format.
- The default preview image extension can be changed on macOS systems.
- Differences between .jpg and .jpeg can cause compatibility issues between devices or applications.
- To change the default preview image extension to .jpg on iMac (Late 2013) running Sonoma (14.7):
- Open a new Finder window.
- Click on the Finder menu and select "Preferences."
- In the "General" preferences pane, select "One of the following" under "New Finder windows show."
- Locate the "jpg" option in the Images folder and select it.
References
- Apple Inc. (n.d.). How to change default applications and file types in macOS. https://support.apple.com/en-us/HT204433
- Microsoft Corporation. (n.d.). JPEG format. https://docs.microsoft.com/en-us/cpp/porting/known-issues-and-workarounds-porting-to-windows-and-linux?view=msvc-160#jpeg-format