Here's a question that Jan has ...... Will all the data from our PC be easily transferable to a Mac ?
Well, it all depends what you want to do. For me the answer was
basically yes.
All my MP3, jpeg and video files worked no problem. I did not anticipate any problems and there were none.
Excel and Word files were easy too. I did not want to purchase a copy of MS Office for OSX so I downloaded the free OpenOffice.org. All .doc and .xls files can be read in OpenOffice so it is really great.
If your lady has some specialized software that runs on Windows only, that will be an issue. We did not have any except some of my RTS games that were PC only. That was a little bit of a bummer but I knew that going in.
If one can run a PC they can run a MAC. Things are different for sure, but when I got stumped on some stupid little thing I would google it and the answer was right there. A good example of that was the fact the the right click on the mouse for cut/paste etc was turned off. I googled why macs do not do this and found out they did indeed do and what I had to do to turn it on. Google helped us out a lot on figuring out some of the things that are different between the two programs.
What I like best about a Mac is the fact that if a program locks up it does not effect the rest of the computer. Just click on the apple icon and select force close. Pick the offending program and click on it. Maybe newer windows versions do that I don't know. I have never owned anything newer than XP SP3. My iMac has never crashed in the two years I have owned it. Never froze up and never needed a reboot to get it running right again.
Hope this helps.