[neon_electro]

My "middle mouse button" on my Mac is the Command key. It does the same thing as the middle mouse button when combined with a left click.

[jonas-w]

Yes, there is also a ctrl + left-click feature in Windows and Linux, but it isn't nearly as convenient as the middle mouse button.

[Izkata]

And on a laptop, 3-finger tap on a touchpad can act as the middle mouse button. May have to enable it, though.