According to this bug and comment: https://bugreports.qt.io/browse/QTBUG-128900?focusedId=823817&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-823817
The deployment target that Qt5/6 shoots for is macOS 12 - perhaps that's what we should standardize on for all macOS > 12 builds. What do people think? —Mark
