Graças ao comentário de Sathya, descobri que tenho o / Applications / Akamai, que foi colocado lá por um instalador da Adobe.
Isso não é malware, e há documentação adequada e até mesmo ferramentas de gerenciamento na pasta:
The Akamai NetSession Interface runs as a service to manage downloads and to let you manage the download process. It was installed on your computer when you downloaded content that uses the service to provide secure, high integrity downloads of large files.
The NetSession Interface supports downloading from a central source and between peers. When peer-downloading is enabled, your computer can serve as an upload source for other computers -- without adverse impacts to your computing. Peer-to-peer downloading can provide faster, more effective downloads.
The NetSession Interface contains no adware or spyware, is safe and secure, uses minimal resources, and provides you the ability to manage and control its actions, including the ability to uninstall it if you do not want it on your computer.
Vou desinstalar de qualquer maneira.