DSF

What is the best practice, do you flip your images in print settings or in the editing software? I am using a Ricoh SG 3110DN on a Mac.

I have the same setup - I flip it in Photoshop.

Yes, I normally use lightroom to import, flip and mark red, then resize edit and mark green. so I can see where I am and use user templates to print or export.

I save "flip horizontally" on the printer setup, so don't have to fret.
Previously, I would "mirror image" on setup, but occasionally forgot..

We have presets for the different print settings saved in the printer driver, but all of them (including the default mode) are set as flip horizontal, or you can select Emulsion Down in Photoshop's own Print Settings.
We prefer to do it in the print driver though, as Photoshop is used with a number of different printers we have, whereas the print driver is tied to its specific printer.

I put the words "Reverse Image" somewhere out of the way and flip the finished image horizontal in PS but don't always remember. At print time I check the text. This is starting to save me a lot of paper...

Anyone on a mac tell me if there is any settings like in the Powerdriver for changing substrates?

If by that you mean a click option for when you are printing for cloth or on Aluminium or what have you, then, no, as far as I am aware there is no such thing on a Mac. If I am wrong, will be happy to be corrected!
AFAIK you can only choose ICC profile, size of paper and type of paper you are printing on, nothing to do with the eventual end-substrate.

Thanks for that Doug thought as much, was on windows 8 with PowerDriver and thought that it would be the same on my Mac

I use Lightroom and make a print template for all my items, this saves all the settings with each template.