macOS 10.13 High Sierra problems
Apple scheduled to release macOS 10.13 High Sierra on September 25, 2017. With a new Operating System, there can always be unforeseeable issues. GRAPHISOFT is actively testing the new macOS version to identify all of these potential problems. We have created a Help Center article that provides always up-to-date information about compatibility with macOS 10.13. We have also linked all already known issues into it: You find the link here:
Based on our preliminary tests, production work with minor glitches is possible on macOS 10.13 in ARCHICAD 20 and 21. At the same time with a new Operating System there can always be some unforeseeable issues, therefore please be cautious when proceeding with this upgrade.