Hot corners not working in macOS Sierra

I am running macOS Sierra 10.12.6 and this method worked fast and simple for me! Changing your hot corner to "Disable Screen Saver" and then back to the original action seems to work:

1. Change the hot corner of "Start Screen Saver" to "Disable Screen Saver" and click [ OK ]
2. Then roll over the hot corner (of course nothing happens)
3. Click back into [Hot Corners...] options, change it back to "Start Screen Saver" and click [ OK ]
4. Screen Saver should activate as expected :-)

I am having the same problem in High Sierra. I use Hot Corners a lot!

Your solution is great BUT no way can I teach my grandparents to do that!

The option below - 'disable' then 'enable' screensaver - did not work either.

I have sent Feedback to Apple.

Any others having this problem?

Craziness. I just found this article. Looks like the dashboard is set to not work by default, you have to turn it back on. Weird.

https://www.macrumors.com/2015/08/20/apple-disables-dashboard-default-osx-el-cap itan/

1. Create a new admin user account on your Mac, log into that user account, set the screen saver hot corners, and test while logged into that user account.- macOS Sierra: Set up users, guests, and groups on your Mac.
2. Boot your Mac into safe mode and test out the hot corners again.- macOS Sierra: Start up in safe mode
3. Restart your Mac like normal and test again.

Try the solution suggested in this post

Re: Screensaver "start time" option grayed out

Back up all data. Quit System Preferences if it's running.

Triple-click anywhere in the line below on this page to select it, then copy the text to the Clipboard (command-C):

~/Library/Preferences/ByHost

In the Finder, select

Go ▹ Go to Folder...

from the menu bar. Paste into the box that opens (command-V), then press return. A folder should open. If it does, look for a file with a long name that begins "com.apple.screensaver". There may be two such files. Move the one without the word "slideshow" in the name to the Trash.

Test. If the problem is resolved. recreate your settings in the Screen Saver tab.

My experience - On top of it I had to quit "System Preference" and open it again, only then it started to work.

perfect and no reboot required.

You might want to consider starting a new discussion. Since this one is marked solved, less people are likely to look at it. A new post would be much more visible. You can link to this one.

Thank you. Good idea. I may have fixed it by simply restarting the Mac.

This did the trick for me as well!!