Impossible to remove dock items

The application iBooks, maps and pictures can be removed is no longer dock.  Also true for the downloads folder.  I saw the old forums, as old as 2014, that has happened to a few people before.  It's always the same applications and files when it arrives. Unfortunately, what has worked for them has not worked for me.  Here is what I tried:

(1) removed every element of the dock option when the application is open (it disappears after resigning, but reappears after the next log in)

(2) removed every element of the docking station when the app is closed, either by dragging or 'options' (even once, reappears after the next login)

(3) delete the plist of dock library.  After restart, got a default dock with the number of items.  Removed the above mentioned, but they reappear after the next login.

(4) deleted the plist for each of the above applications.

(5) has increased to El Capitan Yosemite (nothing has changed)

Other notes:

-open and read the plist for the dock and since it is written in the file to the apps and the file above in the dock.  Tried to edit this file directly, but they always come back.

-have you checked the info on the plist for the dock and found that

(1) I have read and write permissions

(2) in section general, the LOCKED box is unchecked

(3) the modified date is the last time I had logged in

All of this started happening when I ran a series of updates to the system while staying in Yosemite.  One was a security update, I don't remember what the others were.

MacBookPro 15 ", end of 2011

Please read this message before doing anything.

This procedure is a diagnostic test. It is unlikely to solve your problem. Don't be disappointed when you find that nothing has changed after you complete it.

The test is intended to determine if the problem is caused by a third-party software that loads automatically at startup or logon, by a device, by a police conflict or corruption of system files or some system caches.

Disconnect all devices wired except those required to test and remove all the expansion cards from secondary market, as appropriate. Start in safe mode and log on to the account of the problem.

Note: If FileVault is enabled in OS X 10.9 or an earlier version, or if a firmware password is defined, or if the boot volume is a software RAID, you can not do this. Ask for additional instructions.

Safe mode is much slower to boot and run as normal, with limited graphics performance, and some things work at all, including an audio output and a Wi - Fi connection on some models. The next normal boot can also be a bit slow.

The login screen is displayed even if you usually connect automatically. You need your password to log on. If you have forgotten the password, you will have to reset it before you begin.

Test in safe mode. Same problem?

After testing, restart as usual (not in safe mode) and make sure you always have the problem. View the results of the test.

Tags: Notebooks

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