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bridgeOS
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<p>bridgeOS is an <a href="/facts/Embedded_operating_system/0ue9DzHw">embedded</a> <a href="/facts/Operating_system/8XTuvMh2">operating system</a> created and developed by <a href="/facts/Apple_Inc./oTJYta3k">Apple Inc.</a> for use exclusively with its hardware. bridgeOS runs on the <a href="/facts/Apple_silicon/A8RgouDB">T series</a> <a href="/facts/Apple_silicon/A8RgouDB">Apple silicon</a> processors and operates devices such as the <a href="/facts/OLED/219L1aMJ">OLED</a> <a href="/facts/Touchscreen/zpSKDFpe">touchscreen</a> strip called the "<a href="/facts/Touch_bar/d1DuazCK">Touch Bar</a>", <a href="/facts/Touch_ID/dJKF0Fwz">TouchID fingerprint sensor</a>, <a href="/facts/SSD/aMHBy8gU">SSD</a> encryption, and <a href="/facts/Computer_fan/yDmyl4XI">cooling fans</a>. </p><p>At boot time, the <a href="/facts/Bootloader/6sNpcLMK">bootloader</a> executes the bridgeOS kernel, then the bridgeOS kernel passes off to the <a href="/facts/UEFI/w86VGmy2">UEFI</a> firmware. </p><p>bridgeOS is based on Apple's <a href="/facts/WatchOS/zH1fkn2R">watchOS</a>. </p>