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Hi,

Do you mean AutoLISP application doesn't work in AutoCAD after you load it?
What do you see at the command prompt when you:
- load AutoLISP routine with APPLOAD command
- start command after loading it

Just one note: if AutoLISP routine was created for AutoCAD for Windows, it may not work in AutoCAD for Mac, because AutoCAD for Mac doesn't support all AutoLISP functions from PC version. For example it doesn't support Visual LISP functions and DCL.

Maxim