Apple Stores are apparently running low on 27-inch iMacs, fueling the rumor that an update is coming soon. MacRumors reports that around half of Apple’s 249 U.S. retail services are out of both configurations of the big machines. In some cases there are delays—if you order one of these computers now, you won’t be able to get it until at least September 7. This could signal that an expected refresh with Ivy Bridge is coming to the iMacs. An update is long overdue—it was anticipated to come along with the MacBook reboot at WWDC in June, but that didn’t happen. Read the full story at Gizmodo.