How can I disable Photos Agent on High Sierra (10.13.4)? Looks like Photos Agent is running in the background. I'd like to dedicate this machine to file services and not run unnecessary processes. How can I disable "Photos Agent" at boot time. I'm hoping to free up resources like RAM and CPU.
From personal experience, I can say that letting it finish once (it processes photos in the Photos app) makes it end forever.

But you can speed up that process by removing iCloud photos syncing.