SimExams CBT software's exam engine module is availabe for macOS 10.14 or later, so the candidates can take exams from their mac systems. Mac application of exam engine is available for download from App Store.
This app includes all the same features as windows version of the exam engine. You can get a list of features of CBT Exam Engine Module here
App can be downloaded from app store at : Download SimExams CBT Exam Engine
Some screenshots of the App, please click on image to enlarge: