Welcome

Wanting to join the rest of our members? Feel free to sign up today.

  1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. We are looking to recruit editorial team. If you like Apple and you want to express your views on this subject contact Alex Dmitri.
    Dismiss Notice

Mac App Store: "An unknown error occurred (100)" when purchasing

Discussion in 'Mac & OS X' started by Alex Dmitri, Feb 14, 2017.

  1. Alex Dmitri

    Staff Member Super Admin Contributor

    Joined:
    Feb 6, 2017
    Messages:
    171
    Likes Received:
    14
    When attempting to purchase an app, an alert might appear indicating the app couldn't be purchased, as well as "An unknown error occurred (100)".


    Try the following steps to workaround this issue:

    1. Quit App Store.
    2. Wait 10 seconds or more.
    3. Open App Store again.
    4. Navigate to the desired app.
    5. Click Buy.
    If the issue persists, try restarting your computer and attempting the app purchase again.