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Hi Yen Phuong,

Do you use APPLOAD command to load AutoLISP file?
If yes, what do you see in the command window after you select lisp file and pick on "Load" button?
It should be something like this:

_appload Unable to load test.lsp file.
or:
_appload test.lsp successfully loaded.

Was lisp file you are trying to use in AutoCAD for Mac created on PC?
If yes, it may contain functions that are not supported on Mac.