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)
Platforms|

* T series (2016 MacBook Pro and later)

License| Proprietary software except for open-source components
Support status
Supported

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]

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]

## References

1. ↑ "10.15.4 Supplemental Update Bricking Small Number of T2 Macs" (in en-US). 2020-04-17. https://mrmacintosh.com/10-15-4-supplemental-update-bricking-small-number-of-t2-macs/.
2. ↑ Davidov, Misha; Erickson, Jeremy (2019). "Inside The Apple T2". https://i.blackhat.com/USA-19/Thursday/us-19-Davidov-Inside-The-Apple-T2.pdf.
3. ↑ Misha Davidov (Nov 20, 2018). "Secure Boot in the Era of the T2". https://duo.com/labs/research/secure-boot-in-the-era-of-the-t2.
4. ↑ Lianying Zhao; He Shuang; Shengjie Xu; Wei Huang; Rongzhen Cui; Pushkar Bettadpur; David Lie (2024). "A Survey of Hardware Improvements to Secure Program Execution". ACM Computing Surveys 56 (12): 1–37. doi:10.1145/3672392. https://people.scs.carleton.ca/~lianyingzhao/CSUR_survey_hardware_security_authors.pdf.
5. ↑ Snell, Jason; Macworld | (2020-07-08). "The switch to Apple silicon: Will the Touch Bar survive?" (in en). https://www.macworld.com/article/3565403/the-switch-to-apple-silicon-will-the-touch-bar-survive.html.
6. ↑ "TinkerTool System 7, Reference Manual". Marcel Bresink Software-Systeme (MBS). August 22, 2023. https://www.bresink.com/Downloads/TTS7Manual-en.pdf.
7. ↑ Frazelle, Jessie (2020-02-04). "Securing the Boot Process: The hardware root of trust". ACM Queue 17 (6): –60:5–Pages 60:21. doi:10.1145/3380774.3382016. ISSN 1542-7730. https://dl.acm.org/doi/pdf/10.1145/3379512. Retrieved 2024-01-14.
8. ↑ Pepijn Bruienne (May 2, 2018). "Apple iMac Pro and Secure Storage". https://duo.com/blog/apple-imac-pro-and-secure-storage.

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Original source: https://en.wikipedia.org/wiki/BridgeOS. Read more

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