As far as I can tell, the keyboard shortcut to increase font sizes should still be (Mac) Command-Shift-. (or, as I usually think of it, Command-Shift->).
And to decrease font sizes Command-Shift-, (a.k.a. Command-Shift-<).
This still works in InDesign CS6 on my system, but not in InDesign CC.
Is this a bug? Does anyone else have this problem?
International English version.