DR1, in the form of an application called that loaded a Macintosh ROM file stored on disk. Blue Box did not support Mac OS applications that needed hardware access or that relied on non-public Mac OS APIs.

Blue Box beta 1.0 only worked in full screen, requiring users to press to exit the environment, and it implements networking through Open Transport, instead of Rhapsody's BSD sockets. Later versions of Blue Box could run Mac OS in a window.

Rhapsody's

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