By default, Solid modelling apps (many of which do not even exist for Mac) make heavy use of right click. In blender you select the target of manipulation by right clicking.
Then, I obviously left out just doing normal context menu which requires right click.
In magic mouse, if you need to enable right click you need to spend most of the time with right click finger raised. Everyone I know who learned to use right click in non-mac systems have complained about the magic mouse precisely for this problem. All move on to use touchpads (superb in Mac world) or some logitech or Microsoft mouse.