Three new MacBook Pro laptops will be announced at WWDC 2012, according to the latest online rumours.

wwdc 2012 macbook air

MacBook Air models are also expected to feature at Apple's flagship event and the Mac Pro desktop machine could also get its first major update for almost two years.

The Macbook Pro machines will include a 15-inch model that includes a retina display, according to reports on 9to5mac.com.

While the overall design is not expected to change, the specifications are likely to be given a bump.

The 13.3in and 15.4in laptops will come fitted in two different configurations.

The 'normal' version of the 13.3in machine will feature a 2.5GHz dual core processor, 4GB of RAM and a 500GB hard drive, while the higher powered version will offer a 2.9GHz dual core processor, 8GB of RAM and 750GB hard drive.

Meanwhile, the lower-specced 15.4in laptop will include a 2.3GHz quad core processor, 4GB of RAM and a 500GB hard drive, while the improved version will increase that to include a 2.6GHz quad core processor, 8GB of RAM and 750GB hard drive.

Additional upgrades may also be available to upgrade the 15.4in Macbook Pros to 2.7GHz quad core with a 1TB HD.

The Mac Pro launches are expected to include a version with a 3.2GHz quad-core processor, 6GB of RAM, 1TB hard drive and ATI Radeon 5770 graphics chip.

A lower spec version should also feature, as well as a Mac Pro that can be used as a server.

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