OS x System account password after adding emoji expression

A user in ask different share, set his OS X password added emoji expression, the results found, landing system, and can not enter emoji expression. The user also turned on the FileVault encryption feature, which meant that he could not use simple technology to bypass the landing. The only workaround is to use the file vault to recover the key.

Finally, he entered the recovery mode, booted from an external hard drive, installed the emoji keyboard, disabled encryption, and waited several hours to log on to the system.

Of course, for those who have upgraded to OS X El Capitan, there is no need to worry.

Apple has disabled the emoji expression as a password in OS X El Capitan, but can still set the emoji expression as a password under the OS X Yosemite system, but cannot enter when logged in.