Affected version(s): All | Severity: Not our Bug | ID: 257211
When you open a vectorial PDF (e.g. a drawing saved from ARCHICAD) in the Preview application on macOS 10.14 Mojave, the connection of the lines might not be clean.
This is not an ARCHICAD issue, PDF files are saved properly. As you can see in the comparison picture above, the Error is limited to the Preview Application on macOS 10.14, most other PDF Viewers on the same platform make the connections properly. We have contacted Apple about this issue.
UPDATE: this has been fixed in macOS 10.14.5
Go to System Preferences/Software Update to download the latest update for your OS.