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This capability is required so that specialised third-party hardware can load and operate during the earliest startup phases - for example, to start up from external RAID arrays. The executed code is supposed to initialise and configure the hardware it was retrieved from, so that the hardware can be made usable by the rest of the firmware. (This is typically not a true ROM but is instead a rewritable chip that stores firmware.) On UEFI-based systems, that firmware is typically a UEFI driver which is read in by the UEFI firmware and executed. Option ROM security in a Mac with the Apple T2 Security Chipīoth Thunderbolt and PCIe devices can have an “Option ROM (OROM)” physically attached to the device. iPhone Text Message Forwarding security.How iMessage sends and receives messages.Adding travel and eMoney cards to Apple Wallet.Rendering cards unusable with Apple Pay.Adding credit or debit cards to Apple Pay.How Apple Pay keeps users’ purchases protected.Intro to app security for iOS and iPadOS.Protecting access to user’s health data.How Apple protects users’ personal data.Activating data connections securely in iOS and iPadOS.Protecting user data in the face of attack.Protecting keys in alternative boot modes.Encryption and Data Protection overview.UEFI firmware security in an Intel-based Mac.Additional macOS system security capabilities.