First thing I do when using Blender on a new machine is go into the settings and turn on "Emulate 3 Button Mouse". That makes it so you can Alt+Click to rotate

First thing I do when using Blender on a new machine is go into the settings and turn on "Emulate 3 Button Mouse". That makes it so you can Alt+Click to rotate the camera instead of using the middle mouse button. No idea why it's not on by default, since the Alt modifier isn't really used anywhere else (especially in the context of a mouse click)