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Cook told employees he will "miss this work" but takes "enormous comfort" in handing leadership to John Ternus

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Tim Cook sent a farewell memo to Apple $AAPL employees on Monday, his final day as chief executive officer, saying he will "miss this work in ways I can only begin to imagine" while expressing confidence in his successor, John Ternus.

"I love this company and the team behind it, and I couldn't let this day pass without sending a note to you," Cook wrote in the memo, which was obtained by 9to5Mac. "I will miss leading you and being with you for every step, even as I take enormous comfort in handing the helm to someone as brilliant and wonderful and capable as John."