I made a project in my personal computer (mac OS Xlion) and now I would like to modify it on my work computer (windows 7), Is it possible?
You might get problems with the folder structure, if project file and datasources are not in the same folder, or you used absolute instead of relative folder names.
But you can look into the project file with any text editor and fix that.
If your datasources are all in one folder on the mac, save the project file into that same folder using relative paths. You can choose that under
Project -> Project Properties,
Then copy all to the windows machine, and look if it works now.
If not, open a new project and add the same layers. Now you can compare the two project files, especially the part where the layers are loaded between the
<datasource> tags. Change the Mac file to the same structure as the windows file, and it should work.