The AHA cider tutorial describes using a secondary:
And from the former wiki, so does this recipe:
https://web.archive.org/web/20171105040811/http://wiki.homebrewersassociation.org/WestsideCider
If I’m moving the cider from fermenter (in a temp-controlled fridge) to a keg, is the secondary necessary? (From this recipe, the answer would appear to be “no”: https://web.archive.org/web/20171105064511/http://wiki.homebrewersassociation.org/AppleCider)