bridgeOS

{{Short description|Embedded operating system by Apple Inc.}}

{{lowercase title}}

{{Use mdy dates|date=July 2020}}

{{Infobox OS

| name = bridgeOS

| logo =

| logo size =

| logo caption =

| screenshot =

| screenshot_size =

| caption =

| developer = Apple Inc.

| family = {{flatlist|

Unix-like, iOS

}}

| working state = Current

| source model = Closed, with open-source components

| released = {{Start date and age|2016|10|27}}

| discontinued =

| RTM date =

| GA date =

| marketing target =

| programmed in = {{flatlist|

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

}}

| update model = FOTA {{small|(via Mac running macOS)}}

| package manager =

| supported_platforms = {{plain list|

• T series {{small|(2016 MacBook Pro and later)}}

}}

| kernel type =

| userland =

| ui =

| license = Proprietary software except for open-source components

| succeeded by =

| website =

| support status = Supported

}}

bridgeOS is an embedded operating system created and developed by Apple Inc. for use exclusively with its hardware. bridgeOS runs on the T series Apple silicon processors{{Cite web|date=2020-04-17|title=10.15.4 Supplemental Update Bricking Small Number of T2 Macs|url=https://mrmacintosh.com/10-15-4-supplemental-update-bricking-small-number-of-t2-macs/|access-date=2020-08-18|website=Mr. Macintosh|language=en-US}}{{cite web|url=https://i.blackhat.com/USA-19/Thursday/us-19-Davidov-Inside-The-Apple-T2.pdf|title=Inside The Apple T2|first1=Mikhail |last1=Davidov |first2=Jeremy |last2=Erickson |date=2019 |website=blackhat.com}}{{Cite web|url=https://duo.com/labs/research/secure-boot-in-the-era-of-the-t2|title=Secure Boot in the Era of the T2|date=Nov 20, 2018

|author=Misha Davidov|website=duo.com}}{{Cite journal|title=A Survey of Hardware Improvements to Secure Program Execution|url=https://people.scs.carleton.ca/~lianyingzhao/CSUR_survey_hardware_security_authors.pdf|author1=Lianying Zhao|author2=He Shuang|author3=Shengjie Xu|author4=Wei Huang|author5=Rongzhen Cui|author6=Pushkar Bettadpur|author7=David Lie|journal=ACM Computing Surveys|volume=56|issue=12|pages=1-37|doi=10.1145/3672392}} and operates devices such as the OLED touchscreen strip called the "Touch Bar",{{Cite web|last=Snell|first=Jason|last2=Macworld {{!}}|date=2020-07-08|title=The switch to Apple silicon: Will the Touch Bar survive?|url=https://www.macworld.com/article/3565403/the-switch-to-apple-silicon-will-the-touch-bar-survive.html|access-date=2020-08-18|website=Macworld|language=en}} TouchID fingerprint sensor, SSD encryption, and cooling fans.{{cite web|url=https://www.bresink.com/Downloads/TTS7Manual-en.pdf|title=TinkerTool System 7, Reference Manual|date=August 22, 2023|publisher=Marcel Bresink Software-Systeme (MBS)}}

At boot time, the bootloader executes the bridgeOS kernel, then the bridgeOS kernel passes off to

the UEFI firmware.{{Cite journal| doi = 10.1145/3380774.3382016| issn = 1542-7730| volume = 17| issue = 6| pages = –60:5–Pages 60:21| last = Frazelle| first = Jessie| title = Securing the Boot Process: The hardware root of trust| journal = Queue| access-date = 2024-01-14| date = 2020-02-04| url = https://dl.acm.org/doi/pdf/10.1145/3379512}}

bridgeOS is based on Apple's watchOS.{{Cite web|url=https://duo.com/blog/apple-imac-pro-and-secure-storage|title=Apple iMac Pro and Secure Storage|author=Pepijn Bruienne|date=May 2, 2018|website=duo.com}}