Low iMac inventory numbers may suggest an upcoming refresh. If these screenshots from an Apple Authorized Service Provider who asked not to be identified are a true reflection of channel supply on current inventory, numbers are running low -- way low.
Our AASP friend writes, "While putting in an order today we stumbled upon both our suppliers have no stock of 21- or 27-inch iMacs. One picture has an estimated ETA while the other shows all current models at zero stock. All four models look similar to the picture that displays the ETAs."