Hello:
I can run a Safari test fine in a Grid framework using the Safari Web Driver Extension.
(1.) The Safari icon displayed in the Selenium Grid console requires a screen refresh to properly reflect that the Safari icon is grayed out, or busy.
(2.) The Selenium Grid console only displays one Safari icon even when the "maxInstance-10" property is set on a MAC node. All of the Windows nodes display 10 browser icons when the "maxInstance-10" property is set.

Thanks,