iOS App Submission Error: Image Cannot Contain Alpha Channel or Transparency

When submitting an app to the App Store, you may encounter the following error when uploading the App icon:

Error Message: Image cannot contain an alpha channel or transparency.

---

Cause of the Error

Apple has stricter requirements for App icons. The image’s Alpha channel must be set to NO, meaning the icon cannot contain any transparent parts.

---

Solutions

Method 1: Convert Image Format

Convert the icon image to JPG/JPEG format, which automatically removes the transparency channel.

Method 2: Remove Alpha Channel

1. Open the image using Mac’s built-in Preview app.
2. Click the menu File → Export…
3. In the export options, uncheck the Alpha channel.
4. Save the file in PNG format.

---

Example