Hi,
I'm newbie, so I may not have the right answer.
I believe it's Visual Cobol PE that you're considering using. It has 2 forms, the first based on Eclipse, the second base on Visual Studio.
Visual COBOL for Eclipse is available for the following three platforms:Windows, SUSE and Redhat.
Visual COBOL for Visual Studio is for Windows only.
For more details information see this link: