How do we get a macbook laptop to hook up to an bigger monitor for the CKA exam

Hi, is there a way of get my macbook to hook up to an external monitor and use it as the only monitor for the CKA exam. I can do it on windows. The PSI browser only sees one monitor on windows when i configure it to behave as a single monitor. I’ve tried clamshell mode, but the exam checks still said i had 2 monitors.