Have You logged in before your Whatsapp other than your macbook en imac? Example you logged into your PC via apps, or PC via whatsapp Web, maybe somehow they just controlled your whatsapp via PC? The open-source nature of the Arduino project has facilitated the publication of many free software https://click4r.com/posts/g/19325697/de-slimme-truc-van-keuken-wrappen-before-after-dat-niemand-bespreekt