marcoi I had exactly the same problem on MacOs.The old solution was to runĀ  3d-coat before doing export operation from Maya. The latest version 4.8.08 should not have this problem with license detection. Just tried and it works indeed. High Sierra introduced a few more bugs (god damn), but they're not critical. Be sure that you've set paths correctly: /Applications/3D-Coat/4-8/3D-Coat.app /Users/username/3D-CoatV48/Exchange version 2.2.1 ************* Fixed: - The