To install a configuration profile on an Apple device, user acceptance is required unless the device is enrolled in an MDM solution with specific automation (e.g., Automated Device Enrollment). Configuration profiles, which contain settings or policies, are typically downloaded manually (e.g., via a website or email) and must be approved by the user through the Settings app on iOS/iPadOS or System Settings on macOS. An MDM solution (option A) can push profiles, but it's not required for manual installation. An APNs certificate (option B) is needed for MDM communication, not profile installation itself. An ADE token (option D) is for Automated Device Enrollment, not general profile installation. The Apple Platform Deployment Guide notes that user consent is a default step for manual profile installation.