Hey Brent, I didn't know the Affinity programs were owned by Serif. I still have my original Serif Draw CDs from my old Windows days. I always loved their software; inexpensive, easy to use, and great interface. I also have Serif PDF Plus, which was their desktop publishing program for Windows. They even included several hundred free templates with it.
Yea Charlie, they are here in a BIG way for us Mac users. They built Affinity Designer and Affinity Photo from the ground up to work on OS X. Doing this has given them a lot of freedom, to make them very powerful Apps.
They are in the process of delivering Affinity Publisher as well, but that isn't even in the Beta stage yet.
They won a Apple Design Award at WWDC 2015 for Affinity Designer and I would bet they will be there for Affinity Photo next year. They found that if they ported the Window Software over to OS X, then like a lot of other Apps that did this, UI/UX and Features would be lost between the two, and thats why they built if for Mac OS X.
Here is a
good article with them talking about taking on Adobe, and I as a OS X user, get very excited. I have now completely rid my Mac of subscription Adobe Photographers Bundle. I can do all UI/UX/Web Design in one App. They are missing Pantone Support ATM, but it is on there Roadmap to be added with a lot of other Features. The true professionals out there, say this and 3D work is really the only thing missing for it to top Adobe, but people working 3D have dedicated Apps for that.
I bout both Apps for less than $100 AUD about $64 USD . . Bargain