Troubleshooting: HEIF and HEVF (Apple’s High Efficiency Formats)

Mylio supports the importing and syncing of Apple’s High-Efficiency Image Files (HEIF) and High-Efficiency Video Files (HEVF) on iOS devices that are running iOS11 and Mylio 2.4 (4212) and newer as well as Mac computers running High Sierra (10.13) and Mylio 2.4 (4212) and newer.

If photos or videos were taken on an iOS device in HEIF/HEVF before this image type was supported by Mylio, you may need to have Mylio rescan your Camera Roll so that the images import.

Rescanning Camera Roll for HEIF or HEVF Files

  1. Open Mylio on your iOS device.
  2. Select Help from the Navigation panel.
  3. Select Console.
  4. Within the console, type clearignorelist and press Enter.
  5. Close the Mylio application on your iOS device.
  6. Open the camera and take a photo.
  7. Open Mylio. The HEIF and HEVF files will re-import along with the newly taken photo.

Importing HEIF and HEVF on Non-Apple

Apple’s HEIF and HEVF are able to be decoded by Mylio on iOS and Mac devices (iOS11+ and High Sierra (10.13+) only. If HEIF or HEVF files are imported directly to Mylio on a Windows computer or Android platform, the image will appear as an unsupported format (prohibitory symbol).

However, since iOS and Mac devices are able to decode these formats, simply allowing your devices to sync to a supported iOS or Mac device will allow Mylio to generate Thumbnails and Previews for these images and properly display them on non-iOS devices.

You may also rely on third-party codecs that can be installed for Windows devices to decode the images or videos as well.
Here are two HEIC (for photos) and HEVF (for videos) codecs that are needed for these formats to work with Windows:


Changing High-Efficiency format to JPG

In some cases, you may wish to stop using Apple’s high-efficiency format in order to keep your images fully compatible with all of your devices. You can easily revert your photo type back to industry standard JPEGs by following these steps:

  1. On your iOS device, go to the Settings app.
  2. Select Camera.
  3. Select Format.
  4. Select Most Compatible.


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