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    Tim Cook made an appearance at the Boylston Street Apple store

    Tim Cook at Friday’s MIT commencement.
    John Tlumacki/Globe Staff
    Tim Cook at Friday’s MIT commencement.

    Apple chief executive Tim Cook was spotted at his company’s Boylston Street outlet Friday.

    Cook makes appearances at Apple outlets on a fairly regular basis, and he was in town to speak at MIT’s commencement, where he told graduates: “Don’t listen to trolls, and for God’s sake don’t become one.”

    Later on Friday, people, including store employees, took to social media to post photos with Cook at the Boylston location:

    Apple Family??CEO TIM COOK!

    A post shared by Aisha Merced (@aishadaliz818) on

    Today I met #Timcook at the #applestore

    A post shared by Ian (@jollyole) on

    hai #timcook

    A post shared by Christina (Ye Eun) Koo (@goofball1354) on

    #timcook #selfie

    A post shared by �? (@texilicious) on

    Tim Cook and Eddy Cue, it was a pleasure to connect with both of you..see you at Fenway tonight!

    A post shared by Vikram Thomke (@vikram.thomke) on

    Just another day in the office #timcook

    A post shared by Melinda Pinto (@zooma56) on

    When the boss visits work. #apple #timcook

    A post shared by Nathan Schwartzberg (@nascomposer) on

    #applestore #Boston #timcook #ceoapple #apple #babyphadol #weekend

    A post shared by Tenzin Gyalpo (@phadol_gyalpo) on