Im missing the "World Clock Widget" in notification center , how do i get it back ?

Oh, gosh.

You cannot do that.

The com.apple.ncplugin.WorldClock.appex is the executable file that can not recover....

You may install the El Capitan again (in the Appstore, download it and execute), then try my solution in the 1st page of this question.

No problem, mate.

Hope apple will be more careful, and the comming update won't ruin our efforts on this issue.

Sorry, my mistake.

I've removed the com.apple.ncplugin.WorldClock, not the com.apple.ncplugin.WorldClock.appex

But still same issue

Gilles, la solution est celle décrite par D3Huang en première page, mais à la fin, j'avais exactement le même problème et en 30 secondes ça a fonctionné. Seulement que le chemin est different, c'est le suivant:

/Users/XXXXX/Library/Containers/com.apple.ncplugin.WorldClock

Après tu effaces tous les "ncplugin" comme il dit et ça se reconstruit en quelques secondes et tu pourras ajouter toutes les villes.

Thanks D3Huang!!

Thanks D3Huang, this worked for me too! Thanks for your help!

I have the same problem but with social widget and calculator, clock works well for me. If i follow these steps fix the problem? But if I delete these files have to install El Capitan again?

Finally I enter /System/Library/Frameworks/NotificationCenter.framework/PlugIns/ and can activate the calculator. But I figure not file any social widget, any advice?

Don't delete the file ended with .appex, just double click it to see if the issue solved.

The fold I suggest to delete is actually your personal configuration,

which won't hurt your OS.

Thank you very much. I could now turn the calculator. But still can´t find the social widget in the plugins folder notification center.😢

I am sorry mate.

You have a new problem that I have on idea on it.

Hope any other has a solution.

Should be in that folder the widget not? I keep looking for the solution or wait for an update.

Finally enter / this message System / Library / Frameworks / social / xpcservices and found facebook, twitter, linkedyn, but when click in such "facebook" or "twitter" appears to me,

Failed to find Widget /System/Library/Frameworks/Social.framework/XPCServices/com.apple.facebook.xpc

I know your feeling, mate.

But I have a Chinese OSX version, which cut out all the social widgets.

So I can't work on your issue.

Merci, en fait j'ai refait une clean install d'El Capitan, et tout est ok maintenant 😉

I did a clean install, and everything's ok now. Thanks.

I find the solution here! If Share options or Markup is missing after upgrading to OS X Yosemite or El Capitan - Apple Support

🙂