Hi,
welcome to the Plugin Café forum ☺
Before answering your question, I'd like to ask you to please read "Read Before Posting". No worries, I have turned this thread into a "question", added tags and moved it to the Cinema 4D Development category for you.
I'm a bit surprised it's supposed to work on Mac. The thing is, SetTime() just sets the time of the document, but it does not implicitly trigger a re-evaluation or execution of the scene. For this you need to use ExecutePasses() after calling SetTime().
There's some more information on this in our C++ SDK manuals. I know, we are talking Python here, but maybe it's interesting anyway: BaseDocument manual -Time.
Cheers,
Andreas