ProgMapper is a MacOS utility designed to transform MIDI Program Change messages into Control Change messages, routing the output through a virtual MIDI port. This function enables enhanced compatibility between MIDI devices and software by adapting message types to meet specific application requirements.

This tool is particularly valuable when working with MIDI controllers that exclusively send Program Change messages but need to interface with software or hardware expecting Control Change inputs. For example, musicians using a second guitar with a MIDI foot controller can effectively manage preset switching within applications like MainStage by emulating channel strip muting through these converted messages.

ProgMapper also benefits users whose sequencers only recognize Control Change messages for preset or track switching, ensuring seamless integration and enhanced workflow. By bridging the gap between different MIDI message protocols, this utility simplifies complex setups and expands creative possibilities within MIDI environments.