Activate Finder Sync Extension

If not context menu and/or sync overlay icons appear.

Step by step

Check whether the Extension is activated

1. Open the System Preferences
   1. Open the Finder and open /Applications/System Preferences
   2. Press  CMD + Space to open Spotlite and type "System preferences" and hit Enter
2. Click on the icon named "Extensions"
3. Select "Finder" in the list on the left
4. Make sure the checkbox in front of "Liferay Nativity Finder Integration" is checked