BridgeOS

bridgeOS is an embedded operating system created and developed by Apple for use exclusively with its hardware. bridgeOS runs on the T series Apple silicon processors^[1][2][3][4] and operates devices such as the OLED touchscreen strip called the "Touch Bar",^[5] Touch ID fingerprint sensor, SSD encryption, and cooling fans.^[6]

DeveloperApple

Written in

• C
• C++
• Objective-C
• Swift
• assembly language

OS family

Unix-like, iOS

Working stateCurrent

Quick facts Developer, Written in ...

bridgeOS
A MacBook Pro touchbar running bridgeOS
Developer	Apple
Written in	C C++ Objective-C Swift assembly language
OS family	Unix-like, iOS
Working state	Current
Source model	Closed, with open-source components
Initial release	October 27, 2016; 9 years ago (2016-10-27)
Update method	FOTA (via Mac running macOS)
Supported platforms	T series (2016 MacBook Pro and later)
License	Proprietary software except for open-source components
Support status
Supported

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At boot time, the bootloader executes the bridgeOS kernel, then the bridgeOS kernel passes off to the UEFI firmware.^[7]

bridgeOS is based on Apple's watchOS.^[8]