The Common Causes of the Mac Error Code 100006 To be able to get around it, you have to find out what is causing the error code to show up. It keeps on popping up on your screen, unless you take action to resolve it. The error code 100006 on a Mac is usually an indication of a problem or issue with a specific Mac feature, program, or operation. We’ll try to discuss why a Mac is getting the error code 100006, what it is all about, and how to fix it. In an effort to ease the frustration on the part of users, we have created this article. Well, it’s definitely not good news, especially that a lot of them seriously don’t have any idea on how to stop the error code from occurring. Recently, users have complained about getting the error code 100006 on their Macs.