I too am operating a macbook 10.4.11 OS and just downloaded calibre. However, I just purchased my first book from B & N and put it into calibre. When I clicked for it to convert, it said it was drm'd so I went back out to www. & downloaded a de-DRM but when I went to use it, it said it wasn't for my OS :-( How do I de DRM. Can I read my e-book in calibre without having a nook ?
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