Speech reading entire page, not selected text, on Macs
Posted by Respondus Support

There is a known issue in the Chromium engine with Mac->System Preferences->Accessibility->Speech for selected passages of text. If you are using an older version of LockDown Browser for Mac, Speech may only read the entire page. 

We recommend that you upgrade to LockDown Browser for Mac, version or newer in order for selective passages to be read.