I have been using Dymo 6.0 with my Dymo LabelWriter 330 on a Mac G-5 running 10.4.1. I had various problems after install and in my opinion this version is not as good as the previous version unless you have a LabelWriter that requires it. I could get it to work but it was not easy. When the Label Writer interface appears for you to type on you could just click anywhere in the label or if there was something already on the label it was highlighted so you could just start typing your new label. On the new version I had to clear off the typing on the existing label first. Maybe I missed something on the install but I did several installs and removed every trace of the software before doing an install. I have gone back to version 6.x and am happy again as Dymo does make a great label maker. I was thinking about going to the Dymo 400 or Turbo 400 but not if I have to use the 7.0 software.