The FBI informed Apple Inc of a vulnerability in its iPhone and Mac software on April 14, the first time it had told the company about a flaw in Apple products under a controversial White House process for sharing such information, the company told Reuters on Tuesday.

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Though he declined to provide technical details, the executive said the problem had been fixed by the company nine months ago, with the release of iOS9 for phones and Mac OS C El Capitan.

Apple doesn’t plan to release an update for older operating systems.