To turn off iMessage on a Mac, simply sign out of your iCloud account. You can disable iMessage notification on Mac in System Preferences. It's also possible to choose more customized options, like ...

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Apple has launched a new tool to deregister phone numbers from iMessage. This tool is especially useful for people that have switched from an iPhone to an Android or Windows Phone device.

New option helps former iPhone users remove their phone numbers from Apple's messaging system to fix a vanishing text message issue. Steven Musil is a senior news editor at CNET News. He's been hooked ...

Q: After my iPhone was stolen, I replaced it with an Android phone — and now text messages iPhone users send to me vanish as iMessage tries to send them to my old phone.How do I turn that off? A: ...