Thank you for the interest in Mavericks and SlingPlayer working together. SlingPlayer does work with Mavericks and I have a article to show you how to install the plug in correctly with that OSX. The article can be found below.
Hope this helps,
Sling Moderation Team
after upgrading to Mavericks, Slingbox stopped working, spent hours with your chat support, was sent a new Slingbox, still not working. Have of course checked the 'fix' you offer re the security settings and is set correctly. I know if I contact chat, they will tell me to use a different computer, which is not an option. How can I get the Slingbox to work again?
Thanks for using our forums. Sorry you are having issues using your Slingbox on your computer. What exactly seems to be happening? Are you getting any errors? Does it work on a different device? You can always check out this article, and if this still doesn't help, come back and let us know exactly what is happening and we can try to help you further.
The Sling Moderation Team