SiriMote

About

SiriMote is a freeware Mac app that lets you control your Mac with your Apple TV Siri Remote. It works with any app that supports your Mac keyboard's media keys (rewind, play/pause, and fast forward, usually on the F7-F9 keys), including Finder, QuickTime Player, Keynote, and more.

SiriMote also has custom support for many apps, including Keynote, PowerPoint, TV, Kodi, FotoMagico, ProPresenter, and Preview. You can use it to change your Mac's volume and to put your Mac or its display to sleep.

The developer notes that if you enjoy SiriMote and want to support their work, you can check out their other apps.