Welcome to the Forum, Christian,
The latest version of MacENC (8.75) does open vector (ENC) charts under Mojave but cannot open raster charts. Furthermore, this version is 32-bit based code that will not run on future updates to macOS. So we are awaiting news from the developer (iNavX) about an upgrade. You probably need an activation code with this version to access your existing ENC charts. My recommendation is to either wait and see if the developer comes through for us or switch to another application that suits your needs.
The latest version of MacENC (8.75) does open vector (ENC) charts under Mojave but cannot open raster charts. Furthermore, this version is 32-bit based code that will not run on future updates to macOS. So we are awaiting news from the developer (iNavX) about an upgrade. You probably need an activation code with this version to access your existing ENC charts. My recommendation is to either wait and see if the developer comes through for us or switch to another application that suits your needs.
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Jon Longworth
Jon Longworth