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List

ls -le

Add

# Recursively add the following ACE to all files and folders inside Directory Name, marking the ACE as inherited.
chmod -R +ai "group:marketing allow list,add_file,search,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity,file_inherit,directory_inherit" DirectoryName/*

# Apply the same ACE directly to "Directory Name," without marking it as inherited (allowing it to be edited in the Server app).
chmod +a "group:marketing allow list,add_file,search,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity,file_inherit,directory_inherit" DirectoryName

Insert by index +a#

chmod +a# 0 "group:marketing allow list,add_file,search,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity,file_inherit,directory_inherit" DirectoryName

Replace =a#

chmod =a# 2 "group:marketing allow list,add_file,search,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity,file_inherit,directory_inherit" DirectoryName

Remove -a#

chmod -a# 0 DirectoryName

# Use -N to alltogether remove an ACL from a file or directory:
# Tip: chmod -RN will recursively remove ACLs
chmod -N DirectoryName