The Blue Box also refers to either Rhapsody
or Mac OS X
environment to run legacy Mac OS
apps. There are three "boxes" or API
s that run on Mac OS X
: blue for classic
apps, yellow is an updated OPENSTEP
API, and the red box is the Carbon
API. (I could be wrong about the color of the Carbon box, let me know, as it has been a while since Apple quit using those color code names).
The blue box is essentially an emulator that is tightly integrated with the OS that runs the classic Mac OS and all classic applications together, so if one crashes, in most cases, the whole blue box crashes.