mounting NFS v4 results in "Invalid argument"
You are trying to use:


  mount_nfs -o rwsize=32768 -o locallocks -o namedattr -o noac -o
  rdirplus -o nfsv3 jin.local:volume1/File/ /Volumes/File


Instead try:


  mount_nfs -vers=4  -o rwsize=32768 -o locallocks -o namedattr -o noac
  -o rdirplus jin.local:volume1/File/ /Volumes/File


or


  mount_nfs -vers=4,rwsize=32768,locallocks,namedattr,noac,rdirplus 
  jin.local:volume1/File/ /Volumes/File