Apple has recently unveiled the upgrade details for its upcoming 12-inch Retina MacBook laptops.

The upgrade will allow users to bump up the device's processor from 1.1 or 1.2 GHz to 1.3 GHz, MacRumors reported.

Apple's latest MacBook model is scheduled to debut in retail stores on April 10. The basic version, priced at $1,299, comes 8 GB of memory and 256 of flash storage. It is powered by the 1.1 GHz Intel Core M processor. The 1.2 GHz version with a memory of 8 GB and 512 GB of storage will cost $1,599.

But for those who would like to have a more powerful laptop, Expercom, the official reseller of Apple products, announced that it is offering an upgrade option for the Retina Macbooks.

From the 1.1 GHz processor, consumers can choose to change it to the 1.3 GHz Core M CPU with 256 GB of storage for an additional price of $250. This will bring up the total price of the unit to $1,549.

The 1.2 GHz version, on the other hand, can be upgraded to the 1.3 GHz with 512 GB of storage for an extra $150 on top of the model's retail price.

Although upgrade options are available, Expercom and Apple noted that the 1.1 and 1.2 GHz versions will be the only models that will be carried by local retail stores. The 1.3 GHz MacBook editions will only be available as build-to-order versions, according to 9to5Mac.

Based on previous reports and unboxing videos, the 12-inch MacBook with Retina display will feature an edge-to-edge keyboard and a sleeker design than its predecessor.

The laptop will also have fewer ports on its body and will not feature SD card slots and the traditional USB 2.0 and 3.0 ports. Instead, Apple's latest MacBook will only have two ports to support a USB Type-C and headphones.

The Retina MacBook will debut on Friday, which is the same day as the scheduled demo date for the Apple Watch.