EV3 Installation failure on OSX El Capitan 10.11.3
I tried several approaches. Uninstalling and installing Silverlight, uninstalling and reinstalling EV3 and none solved anything. It looks like the installer looks for Silverlight and ends in error. Furthermore, launching EV3 resulted in a crash. No matter I reinstalled version 1.0 and started to update it.

El Capitan is very rigorous with plug-ins. First, launch Microsoft Silverlight in the Applications folder. In the Application Storage tab confirm that Enable Application Storage is selected (ticked). Close Silverlight preferences. In Safari, select Safety and confirm that Enable plug-ins is selected. Press Manage Plugins Settings button (or something similar, my computer is localized in Spanish). Confirm that Silverlight plug-in is checked. In the lower right (when visiting other web sites) select Always Allow (I also selected Execute in non safe mode but I do not counsel it) and Apply.


Now launch Mindstorms EV3 and should not crash and be the latest version. Mine one is now functional: