Apple suppliers have started shipping a 13in version of the MacBook Pro with Retina display, according to Digitimes.

The smaller version of the laptop with boosted display is expected to be released this month or next, the paper said, citing sources from the upstream supply chain.

Digitimes also said Apple was preparing revamped iMacs, but has delayed plans for an updated "high-end model" due to "poor yields." It will instead focus on mid-range and entry-level iMacs, the paper said, but few other details were available.

Apple unveiled a 15.4in version of its MacBook Pro with Retina display at the Worldwide Developer Conference (WWDC) in June. The screen comes in at 2,880 x 1,800 and 220PPI, which Apple's Phil Schiller said makes it the world's highest-resolution notebook.

Rumours about a 13in version of the MacBook Pro Retina display started soon after. In July, KGI Securities analyst Ming-Chi Kuo predicted in a note to investors that a new iPod touch and iPod nano, a tweaked iPad and new iPad Mini, as well as a 13in Retina MacBook Pro and two updated iMacs would hit shelves around the upcoming iPhone 5 release.

At this point, the focus is primarily on the new iPhone, which Apple is expected to launch at a Wednesday press event in San Francisco. But a 13in MacBook Pro with Retina display would be a nice addition to Apple's holiday lineup, so stay tuned.

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