Q:

How can I select edge loops with Magic Mouse on a Mac?

I’m on an iMac with a Magic Mouse (no scroll wheel or RMB). I use RMB selection, via ⌘ command LMB. I have enabled Emulate 3 Button Mouse.
I'm trying to figure out how to select edge loops. The usual method is Alt LMB, so for me that would be Alt ⌘ Command LMB, but that does nothing.
I tried adding this preference (and tried all the mouse action types: Any, Press, etc.), but still nothing.

How can I select edge loops with Alt ⌘ Command LMB?

A:

Figured it out! Whoo hoo. Turns out this is what I had to do:

Select an edge (using CommandLMB)
Open the Select menu.
ControlLMB (right-click) "Edge Loops".
Select "Add Shortcut".
Press Alt Command LMB, which Blender interprets as Cmd Middle Mouse.

It seems that Alt LMB emulates the Middle Mouse Button. Not only that, mesh.loop_multi_select was the input I wanted, not mesh.loop_select, as I'd originally thought.
After I added that shortcut, this new input setting appeared in my user preferences:

All is not lost for Magic Mouse users.

