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New Touch ID rules: Why you have to enter your passcode when you wake up

If you haven’t used your passcode to unlock your iPhone or iPad for six days, an iOS 9 restriction disables Touch ID if you don't unlock with a fingerprint within eight hours.

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Glenn Fleishman is the author of dozens of books. His most recent include Take Control of Your M-Series Mac, Take Control of Securing Your Mac, Take Control of Zoom, and Six Centuries of Type and Printing. In his spare time, he makes Tiny Type Museums. He’s a senior contributor to Macworld, where he writes Mac 911.