Two unreleased iMacs referenced in macOS Big Sur 11.3 beta

Apple's beta releases continue to yield clues about unannounced hardware, with Tuesday's macOS Big Sur 11.3 beta including references to two new iMac designations. Spotted by 9to5Mac, the macOS Big Sur beta issued to developers today includes hardware identifiers for an "iMac21,1" and "iMac21,2," both of which do not match existing iMac models.According to the site, "iMac21,1" and "iMac21,2" correspond to iMacs codenamed J456 and J457. In January, Bloomberg outed those designations as next-gener...