Hi Nick
I am running the latest version of SkyX (Version 10.3.0, Build 8648 of 17 February 2015) the latest version of your plug-in (R145) on a MacMini (Late 2012) under OSX Yosmite with a new Atik 414EX. I am getting hard crashes on initial capture which close the SkyX all together.
Please let me know what additional info you need, or private message / email me if you would like to remote into my setup.
Cheers
Logieberra