Mac App Store: Sign in sheet does not appear, or does not accept typed text
Resolution
Third-party software that alters your system, such as FruitMenu or APE (Application Enhancer), may cause these issues.
Disable or remove the third-party software.
Third-party software that alters your system, such as FruitMenu or APE (Application Enhancer), may cause these issues.
Disable or remove the third-party software.