Yes—shooting RAW is a good choice if you want more flexibility when editing, though it does add processing work. For software, both Lightroom and Aperture are capable RAW-processing applications and both have been used by beginners and professionals.

Lightroom is often preferred if you already use other Adobe software, because its workflow integrates well with programs like Photoshop. If you’re familiar with Adobe’s interface, that can make the learning curve easier.

Aperture was also considered a strong, professional-quality option, especially for Mac users, and was seen as good value. In practice, the choice between the two is mostly about workflow and personal preference rather than one being clearly “better” for image quality.

On a Retina MacBook, either should be suitable, with support/improvements for high-resolution displays expected from the vendors.

So: as a beginner, RAW is fine, and you likely won’t go wrong with either program. Choose Lightroom if Adobe integration matters to you; choose Aperture if you prefer Apple’s ecosystem and interface.