any way to enlarge font size on new 2013 iMac 27 inch?

Try command + "+" to increase

and command + "-" to decrease the font size.

Hi,

In the Finder > View Menu > View Option > change the Text size.

This changes the size of text under the icons on the Desktop.

If you open any Finder window after this you can create a Default size for all windows from the same panel.

8:19 PM Thursday; October 17, 2013

 iMac 2.5Ghz 5i 2011 (Mountain Lion 10.8.4)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
 Couple of iPhones and an iPad
"Limit the Logs to the Bits above Binary Images."  No, Seriously