If you saw my earlier thread about Mac killing off Aperture you know that it doesn't work with the new operating system Yosemite. Therefor, the Photomatrix HDR plug in also doesn't work. I've looked at the new "Photos" program that they included with Yosemite but it's pretty basic and the plug in, apparently, doesn't work with that either. Anyway my question now is what would be a good program for HDR that isn't too expensive or too complicated to use that would work on my iMac with this new OS? Thanks in advance for the info.