Our website provides a free download of Siri 1.0 for Mac. This free Mac app is an intellectual property of Diabolisch Dev Team. The software belongs to Audio & Video Tools.
From the developer:
Siri 4mac is the port of siri to mac os x is completely offline and will offer basic commands
Siri 4Mac will bring the basic experience of siri to the mac,
will include all commands siri for iPhone 4s has, and
also, some custom commands created to get the most
from Mac’s features
You may want to check out more software for Mac, such as InstallSiriServer, SiriMote or TinyAlarm, which might be similar to Siri.