Following multiple reports claiming Apple was working with suppliers and manufacturing partners to develop a new 15-inch MacBook Air, it now looks as though the rumored slim 15-inch laptop is part of a redesigned MacBook line that will also include a 13-inch model. Citing unnamed sources within Apple’s supply chain, DigiTimes on Friday reported that new thinner MacBook Pro laptops have entered production and shipments could begin as soon as this month. Monthly yield is expected to initially fall between 100,000 and 150,000 units, but the site claims shipments will soon climb to 900,000 units. Details are scare beyond the thinner case, and no launch time frame was provided. An earlier report suggested Apple’s slimmer 15-inch notebook will launch in April.