Fractional Fonts on the Mac?

Does anybody know how to draw fractional fonts on the Mac? Apparently the Mac won’t do it. It should work just like it does on the PC, but it don’t. This here feller showed me some test code that he ran on the PC that utilized fractional point sizes, and I ran the same code on my Mac and only got integer point sizes. Does anybody know what’s up here?

Sounds like a Mac render engine limitation. Can you do fractional points from C code on the mac?

Certainly I’ve never seen fractional point sizes in a Mac (or for that matter a PC) application’s font chooser…