Topic summary
BridgeOS
bridgeOS is an embeddedoperating system created and developed by Apple for use exclusively with its hardware. bridgeOS runs on the T seriesApple silicon processors and operates devices such as the OLEDtouchscreen strip called the "Touch Bar", Touch ID fingerprint sensor, SSD encryption, and cooling fans.
At boot time, the bootloader executes the bridgeOS kernel, then the bridgeOS kernel passes off to the UEFI firmware.
bridgeOS is based on Apple's watchOS.