Hi John, Studio Pro for Mac (Beta) only contains the Design mode.
Luckily there are two other options in Studio Pro that can help you with viewing and editing the structure of a page. See also the screenshot below.
1. The Page explorer on the left, provides you an editable tree structure of the page.
2. (from Mx 10.9) you can use the X-ray toggle to see the main page elements.
Does anyone know when this structure mode will be implemented in the Mac version of Mendix? It's very difficult to work with only the design mode.
On the top of your page tab there are 2 buttons:
I use the 10.8.1 Beta for Mac.
I don't see this buttons