I realize that RT was originally a Windows program, but they are also developing a Mac version. I tried it and found it to be virtually unusable. On those rare occasions when it did not freeze, the results were mediocre. For Mac users wanting the very best raw conversions, RPP is the one. RPP is not a full featured workflow machine, but the results are clearly superior to all of the big time programs. Unfortunately for Windows users, there will probably never be a version for them, according to the developers.