SAMBA: Account 'guest' can log in from Linux, but not from MacOS?

root@ultraman:~ # testparm -s
Registered MSG_REQ_POOL_USAGE
Registered MSG_REQ_DMALLOC_MARK and LOG_CHANGED
Load smb config files from /usr/local/etc/smb4.conf
Processing section "[FRUITTEST]"
Loaded services file OK.
Server role: ROLE_DOMAIN_PDC

# Global parameters
[global]
    deadtime = 15
    disable spoolss = Yes
    dns proxy = No
    domain logons = Yes
    dos charset = CP437
    hostname...