Software updates are exciting, especially when they get leaked and give users an early chance to try out something they might otherwise be waiting a long time for. The excitement was palpable when we leaked a test Android 4.4 KitKat firmware for the Galaxy S4 earlier today, but if you've been using Chainfire's SuperSU app for root access, you might have noticed it's not working on KitKat. But thanks to Chainfire, that was a short-lived problem, as the popular developer has released an updated version of SuperSU that works with the KitKat build on the Galaxy S4.
The new SuperSU is available as a zip file that you can flash from recovery, and is also included in Chainfire's CF-Auto-Root package for rooting through Odin without the need of a custom recovery. You can download either from the links below, and head to the source link for more details on the fix.
Download: SuperSU, CF-Auto-Root