Miguel Alvarado has found a glitch that lets users delete an iCloud account from an iOS 7.1 device without the Apple ID password. In this YouTube video, he demonstrates tapping the Delete Account button and the Find My iPhone switch simultaneously, then restarting the iPhone when the both prompts appear simultaneously. When the iPhone booted back up, he was free to remove the iCloud account, which disabled Find My iPhone. There’s some speculation that this may not affect all iPhone models; although we could replicate it on an iPhone 5s, we were unable to do so on an iPhone 5. Nonetheless, we hope Apple releases a fix soon, and in the meantime, make sure to use a passcode. follow link
Single Time Machine Backups
Tired of Time Machine running all the time? You can turn it off in the Time Machine preference pane, but still initiate a single backup by choosing Back Up Now from Time Machine's menu bar icon. Of course, your backup is much less likely to be up to date, but Time Machine won't be taking any resources while you're trying to work.
iOS 7.1 Vulnerability Lets Bad Guys Disable Find My iPhone