密码正确，无法登录、解锁、安装软件
管理员帐号，在系统设置里想解锁时，输入密码，不解锁，也没错误提示。安装软件，输入密码后也没反应。密码肯定正确，不正确对话框会晃。
登录为单用户，执行：
fsck -fy
mount -uw
rm /var/db/.AppleSetupDone
再重启，设置一新用户，设置登录时输入密码，则出现选择用户的界面，无论哪个用户，输入密码后都回到这页面来，不登录。密码是简单的密码，肯定正确。
再登录为单用户，再设一新用户，设置登录时不输入密码，则可登录进去，解锁或安装软件，输入密码仍无反应。
在解锁失败后，查看 /var/log/secure.log，有以下部分：
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_authenticate(): Got user: tdxiong
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_authenticate(): Got ruser: (null)
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_authenticate(): Got service: authorization
Nov 19 14:23:39 promote authorizationhost[200]: in od_principal_for_user(): No authentication authority returned
Nov 19 14:23:39 promote authorizationhost[200]: in od_principal_for_user(): failed: 7
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_authenticate(): Failed to determine Kerberos principal name.
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_authenticate(): Done cleanup3
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_authenticate(): Kerberos 5 refuses you
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_authenticate(): pam_sm_authenticate: ntlm
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_acct_mgmt(): OpenDirectory - Membership cache TTL set to 1800.
Nov 19 14:23:39 promote authorizationhost[200]: in od_record_check_pwpolicy(): retval: 0
Nov 19 14:23:39 promote authorizationhost[200]: in od_record_attribute_create_cfstring(): returned 2 attributes for dsAttrTypeStandard:AuthenticationAuthority
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Establishing credentials
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Got user: tdxiong
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Context initialised
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Got euid, egid: 0 0
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Done getpwnam()
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Done setegid() & seteuid()
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): pam_sm_setcred: krb5 user tdxiong doesn't have a principal
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Done cleanup3
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Done seteuid() & setegid()
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): Done cleanup4
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): pam_sm_setcred: ntlm
Nov 19 14:23:39 promote authorizationhost[200]: in pam_sm_setcred(): pam_sm_setcred: no domain found skipping
Nov 19 14:23:39 promote com.apple.SecurityServer[29]: UID 503 authenticated as user tdxiong (UID 503) for right 'system.preferences.accounts'
按Kerberos 5 refuses you搜网上，找到一类似问题，进行以下操作：
sudo rm -fr /var/db/krb5kdc /etc/krb5.keytab /Library/Keychains/System.keychain
sudo /usr/libexec/configureLocalKDC
再重启，问题照旧。
可有人知道解决方案吗？