Is it possible to hide tracked changes popups in Pages?
Solution 1:
Kind of annoying but it works.
In your document, in the menu bar, go to View>Show Comments & Changes Pane then under View Options select Hide Changes.
Note: You must keep this pane open or the popups will come back, although you can move it off screen or shrink it to a minimal size.
If you would also like to hide the coloring you can Select the Gear icon 
and then select Final
