Hi Dave,

Are speaking about editing with grips?
- When you select text blue square appears in the insertion point of the text and you need to pick this square which turns in red.
Than on Mac you have the same functionality as on Windows. In order to be able to Rotate text (or any other object) with grips you need to hit spacebar one time to switch grip editing mode to ROTATE.

Look here:

https://knowledge.autodesk.com/support/autocad/learn-explore/caas/CloudHelp/cloudhelp/2016/ENU/AutoC...

Maxim