parsecd is apparently "Used for Suggestions in Spotlight, Messages, Lookup and Safari" according to a Reddit comment (https://www.reddit.com/r/mac/comments/5487

parsecd is apparently "Used for Suggestions in Spotlight, Messages, Lookup and Safari" according to a Reddit comment (https://www.reddit.com/r/mac/comments/54870l/what_is_comappleparsecd/d80nyop/ https://www.reddit.com/r/mac/comments/54870l/what_is_comappl...). LaterAgent is used for system updates. Specifically, it appears to be what handles reminding you again later when the system prompts you to install an update and you select the option to remind you again later.