brew install postgresql
solved my problem!
Beeth0ven
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thx for @JonnieM 's answer,
i found the missing files:
libpq.5.6.dylib
libpgtypes.3.4.dylib
libecpg.6.5.dylib
libecpg_compat.3.5.dylib
can be resolved with homebrew:
$brew install postgresql
then my navicat sucessfully launched on big sur.