An Apple Mac computer has to be scanned through SSH as it is a UNIX based OS. I would recommend going over
this knowledge base article which will provide you with the needed requirements to be able to scan an Apple Mac device.
Afterwards, you can go through
this article which will explain how to scan an Apple Mac computer. If you are still unable to scan your Apple Mac devices after making sure that you meet the needed requirements, you can contact us via support@lansweeper.com to troubleshoot the issue further on.