MacBook refresh Apple has not refreshed many of its Mac lineups in a year or more, so many are expecting several of the lines to get an update at the conference next week. Apple reportedly is going to announce a new 15-inch MacBook Pro, which may feature Retina Display, support third-generation USB, have a design similar to the MacBook Air, and sport no optical drive. The MacBook Air, iMac, Mac mini, and Mac Pro may also receive updates, wrote Sterne Agee's Wu. He believes these lines will be upgraded with Intel's ( INTC) Ivy Bridge microprocessors, "which brings more performance per watt and enhanced graphics." Sales of Macs showed weakness in the company's fiscal second quarter ended in March, according to Barclays Capital analyst Ben Reitzes, with Apple selling 4 million Macs during the quarter. He expects it to increase as Apple refreshes the lines and adds more features. "We believe innovations, new software, more NAND options and more attractive pricing could catalyze sales - with the potential to double the run rate sales of portables at Apple within a few quarters," Reitzes wrote in a research report. He rates Apple at overweight with a $750 price target.