Am I missing something, or is it not in this version on a MAC?

I have some si2k footage I need to convert, and could use the correct gamma settings to get me started.

Thanks!

Look again, it is there.

Looked again. I do not see it.
version 5.5.4.102

ON A MAC:
it has encode /decode curves:
There is no SI-2K LOG.

ON A PC
There is SI-2K LOG

Am I missing something? Or are we talking about something different?

SI-Log = Log 90 (on the PC is says the Log base is 90 also.)