Since I upgraded my Mac last year, I've had to come up with an alternative to Photoshop and InDesign and believe me, there's not much choice out there.
I've been using a combination of Pixelmator (€29.99) for the image editing and iStudio Publisher (Just €20.99!) for creation of printed documents. Compare that with the €120 per year for ever of just Photoshop alone. PS is great but bloody hell.
The interface of both these substitutes are clunky (with Pixelmator being the slickest) but I'm getting used to them and I haven't found much functionality that I've missed - neither have anything like the sophistication of Adobe's products. But; they work perfectly well for most of anyone's needs. Scanning, image preparation, a small amount of digital illustration and putting together a perfectly good, professional catalogue.
So the above image is the result of that combination: The cover for my 16 page catalogue for my upcoming exhibition Flights of Fancy.