Login Problems with Yosemite

Could it be that you have a sticky key on your keyboard, are you able to plug another keyboard in to test.

If not open an application that allows you to enter text, and test by entering your password to see if a key is

sticking and therefore repeating.

Please go to system preferences - users and groups - login options - set automatic login as OFF .

Thanks !

If computer is joined to network servers , you can choose options from this article : OS X El Capitan: Allow network users to log in to your Mac

Go to users and groups , login options - network account server - click on join .

Thanks !

Are you able to try another keyboard, borrow one perhaps, just to see if it is a problem with your keyboard. A wired one

would useful to rule out any bluetooth issues.

You could also try updating to 10.11.6 by downloading and installing the Combo version from here,

Download OS X El Capitan 10.11.6 Combo Update,,the advantage of installing the Combo update is that it resets certain files and may help to iron out any niggles.

As you are on 10.11.5 you may want to stay on that version and not update, so here is a link to the 10.11.5 Combo update, Download OS X El Capitan 10.11.5 Combo Update.

It is not a problem to install either of these updates, just make sure you have made a backup of your Mac.

Download whichever one you choose, and once downloaded, double-click to install.

Please open safari - safari preferences - click autofill - uncheck users name and password ,

And also in passwords select username click on remove and in the same way for password .

Screen shot for reference :

Suggested article for it : Safari 9 (El Capitan): Use AutoFill to enter contact info, passwords, and more

Thanks !

How does that help him with logging in to his mac?

Fill in your user name and password

• If you previously stored your user name and password for the website, Safari automatically provides the information. Click in the user name field, then choose your user name.If there’s no stored information for the website, do either of the following:
  • If another website uses the same user name and password, you can use its stored information. Click in the password field, click the AutoFill Key , then choose Other Passwords. Select the website with the user name and password you want to use, then click Fill.
  • If the website’s user name and password are unique, store the information so Safari can automatically provide it next time. Enter the user name and password, or generate a password (described below), then click Save Password when asked.
• As per article the user must have followed these steps and if auto fill username and passwords is unchecked the password will not be saved for that particular website .
• The user can select username and click on remove , and in the same way for password and click on remove ( as shown in the screen shot ) .

Thanks !

The problem is he cannot login from sleep, there is no mention of Safari in his initial post.

In security and privacy : general - require password immediately after sleep or screen saver begins as immediately has no connection with login.

And he has already said in posts that automatic login is off in users and groups , he has admin account or standard account ( not sure ) .

If he enable fast user switching and has multiple computers on the same network and is not having admin account the other users can send spams to his computer .

But how is it possible he typed first alphabet of the password at login window of user name and password and it fills all of it , by magic itself .

Thanks !

you have not read the initial post

He is holding only one key ( say A ) , and not leaving the key so in the password field A will be be typed continuously until he releases the key .

Where in the body of the initial post is it mentioned that he is holding one key down and causing it to repeat?

Your posts are completely meaningless to the original problem.