An infrastructure where the server tracks devices so it can send a message to the device. This contrasts with pull where the device is responsible for checking periodically for new messages.

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How to disable Apple Push Notification Service (apsd) on OS X 10.8?

I am using an iMac at work, and the IT security guys are raising issue with the Apple Push Notification Service (apsd) trying to bypass the proxy continually. I would like to know how I can disable ...