In 2017, Apple made a massive change to the way iPhones handle photography by replacing the standard, decades-old JPG image format with HEIC (High-Efficiency Image Container). While HEIC is a fantastic technical achievement—capable of storing high-quality photographs at roughly half the file size of a JPG—it presents a nightmare for compatibility. If you try to upload a HEIC photo from your Mac to a government web portal, a university submission system, or a non-Apple device, the file will almost certainly be rejected as “unsupported.”
Fortunately, you do not need to download sketchy third-party conversion apps or pay for premium software. Learning how to convert HEIC to JPG on Mac is a native, incredibly fast process built directly into the macOS operating system.
Why Does Apple Use HEIC?
HEIC (and the broader HEIF standard it relies on) uses advanced compression algorithms to shrink the file size of your photos without sacrificing visual quality. If you have a 256GB iPhone, shooting exclusively in HEIC effectively allows you to store twice as many photographs before running out of space.
While the Apple ecosystem (macOS, iOS, and iPadOS) reads HEIC files perfectly, older versions of Windows, many Android devices, and legacy web browsers simply do not possess the necessary codecs to decode the image, necessitating a conversion to the universally accepted JPG format.
Step-by-Step Guide: The Quick Actions Method (Fastest)
If you are running macOS Monterey, macOS Ventura, or macOS Sonoma, Apple has integrated a lightning-fast conversion tool directly into the Finder interface. This is the best method for converting single images or massive batches of photos instantly.
Step 1: Locate Your HEIC Files
Open a Finder window and navigate to the folder containing the HEIC images you wish to convert.
Step 2: Select the Images
Click on the image you want to convert. If you want to convert multiple images simultaneously, hold down the Command (⌘) key and click on each file you wish to select.
Step 3: Use the Quick Actions Menu
Right-click (or Control-click) on the selected files to open the context menu.
- Hover your cursor over the Quick Actions option near the bottom of the menu.
- From the slide-out sub-menu, select Convert Image.
Step 4: Choose the Output Format and Quality
A small pop-up window will appear on your screen. Ensure the “Format” drop-down is set to JPEG. Below that, you can adjust the “Image Size” (keep it at Actual Size to preserve the resolution). Finally, click the blue Convert to JPEG button.
Your Mac will instantly generate new JPG copies of your photos in the exact same folder, leaving your original HEIC files completely untouched and safe.
Alternative Method: Using the Preview App
If you are using an older Mac that does not support the Quick Actions menu, or if you want to apply specific colour profiles during the conversion, you can use the native Preview application.
Step 1: Open the Image in Preview
Double-click the HEIC file. By default, it will open in Preview, the built-in macOS image viewer.
Step 2: Access the Export Menu
Navigate to the very top menu bar on your screen. Click on File, and then select Export… from the drop-down list. (Make sure you select Export, not Export as PDF).
Step 3: Configure the Export Settings
A save dialogue box will appear.
- At the bottom of the box, locate the Format: drop-down menu.
- Change the format from HEIC to JPEG.
- A “Quality” slider will appear. Drag the slider to adjust the compression (moving it to “Best” yields the highest quality but a larger file size).
- Choose where you want to save the new file, and click Save.
How to Stop Your iPhone from Shooting in HEIC
If you find yourself constantly converting files for work, the most productive solution is to stop the problem at its source and force your iPhone to shoot in JPG natively.
- Open the Settings app on your iPhone.
- Scroll down and tap on Camera.
- Tap on Formats.
- Change the setting from “High Efficiency” (which uses HEIC) to Most Compatible (which uses standard JPG).
Warning: Selecting “Most Compatible” means your future photos will consume significantly more storage space on your iPhone and in your iCloud account.
Frequently Asked Questions
Does converting to JPG reduce image quality?
Technically, yes. Because JPG uses an older, less efficient compression method, converting from HEIC to JPG involves decoding and re-compressing the image. However, unless you are printing the photograph on a massive billboard, this minor loss in quality is completely imperceptible to the human eye.
Is JPG the same thing as JPEG?
Yes. They are the exact same file format. The only difference is the file extension lettering, which stems from the old DOS days when file extensions were strictly limited to three characters (hence .jpg instead of .jpeg).
Dealing with format incompatibility is a frustrating interruption to your daily workflow. However, by mastering the built-in Quick Actions menu, you can instantly convert HEIC to JPG on Mac in seconds, ensuring your photographs can be viewed, shared, and uploaded flawlessly across any device or platform in the world.
