Step 1. Download and install Movavi's MP3-to-AAC converter
The first step of converting MP3 to AAC with the help of Movavi Video Converter is to actually download and install the program. Make sure to choose the right files for your platform: if you want to convert MP3 to AAC on your Mac, you'll need to download the MP3-to-AAC converter for a Mac, whereas Windows users will require the Windows version. Once your download is done, follow the on-screen instructions to install.