Apple has released their new, non-cat OS, I am happy to say, Vezér is fully compatible with 10.9 Mavericks. But don't rush, before upgrading to the new OS, here is a checklist to make sure everything will be working:
Do a backup of your system before upgrading to Mavericks.
If you experience any problems with Vezér on 10.9 Mavericks, please let me know immediately on the support site.