Apple on Tuesday refreshed its 13-inch and 15-inch MacBook Pro with Retina display lineup, just in time for the back-to-school shopping season. The new machines are now powered by Intel's fourth generation Haswell processors and ship with more memory.

The entry-level 13-inch model still starts at $1,299 but now includes a 2.6GHz dual-core Core i5 CPU and 8GB of RAM, up from a 2.4GHz Core i5 and 4GB of memory. An extra $200 buys a larger 256GB solid state drive while the top-of-the-line 13-inch model includes a 2.8GHz Core i5 chip, 8GB of RAM and a 512GB SSD for $1,799.

The 15-inch models, meanwhile, begin at $1,999 and includes a 2.2GHz quad-core Core i7, 16GB of RAM and 256GB of flash storage. The high-end model, now $100 cheaper at $2,499, boasts a 2.5GHz quad-core i7, 16GB of memory, a 512GB SSD and an Nvidia GeForce GT 750M.

Keep in mind that these are just the off-the-shelf models. Apple also offers build-to-order systems that let you specify the components you want in a machine. Going that route, customers can select up to a 3.0GHz dual-core i7 on the 13-inch line and up to a 2.8GHz quad-core i7 for the 15-inch model.

Additionally, both models can be configured with up to 1TB of flash storage should you happen to need that much space locally.

Last but not least, the 13-inch non-Retina model also received a price cut, going from $1,199 down to just $1,099.