MacOS: Enable Full Disk Access
When installing or updating MEP Designer on a macOS, you will see a warning: for MEP Designer to run properly, you must enable Full Disk Access in macOS settings.
Follow these steps:
- In the MEP Designer Warning dialog, click the link: Open System
Settings/.../Full Disk Access Settings.

- At the bottom of the list, click the Plus sign. You may need to
enter a password.

- Navigate to Applications > Graphisoft > MEP
Designer Folder > MEP Designer Application.

- Click Open or drag and drop to add it to the list.

- Return to the MEP Designer Installer and click Next to continue.