I am running OS X 10.7.5. If I upgrade to Mountain Lion will I have Siri?
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Siri isn't compatible with OS X, so you will only get Dictation when you upgrade to OS X Mountain Lion > http://support.apple.com/kb/HT5449
Siri is on an iPhone 4s or 5 and iPad 3 and 4.
No. Siri is exclusive to supported iDevices like the iPhone.
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