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In Mac OS X, being based on BSD's UNIX-like kernel, the system architecture is vastly different from that in the classic Mac OS, and an application crash cannot usually bring down the entire system.
The classic Macintosh startup sequence includes hardware tests which may trigger the startup chimes, Happy Mac, Sad Mac, and Chimes of Death.. All Macs made from 2016 to 2020 have the startup chimes disabled by default, however it would later be re-enabled on those Macs running macOS Big Sur or later; this can be disabled by the user within System Preferences (Big Sur up to Monterey) or System ...
Mac OS X succeeded classic Mac OS, the primary Macintosh operating system from 1984 to 2001. Its underlying architecture came from NeXT 's NeXTSTEP, as a result of Apple's acquisition of NeXT, which also brought Steve Jobs back to Apple. The first desktop version, Mac OS X 10.0, was released on March 24, 2001.
macOS. The history of macOS, Apple 's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project to replace its "classic" Mac OS. That system, up to and including its final release Mac OS 9, was a direct descendant of the operating system Apple had used in its Mac computers since ...
Mac Pro 2nd generation (Cylinder), launched December 19, 2013. MacBook Retina, launched April 10, 2015. Touch Bar of MacBook Pro with Butterfly keyboard, launched October 27, 2016. iMac Pro, launched December 14, 2017. MacBook Air (13-inch, Retina), launched October 30, 2018. Mac Pro (3rd generation) "cheese grater", launched December 10, 2019.
XNU ("X is Not Unix") is the computer operating system (OS) kernel developed at Apple Inc. since December 1996 for use in the Mac OS X (now macOS) operating system and released as free and open-source software as part of the Darwin OS, which, in addition to being the basis for macOS, is also the basis for Apple TV Software, iOS, iPadOS, watchOS, visionOS, and tvOS.
macOS Ventura supports Macs with Apple silicon and Intel's Xeon-W and 7th-generation Kaby Lake chips or later, and drops support for Macs released from 2015 to 2016, officially marking the end of support for the Retina MacBook Pro, 2015-2017 MacBook Air, 2014 Mac Mini, 2015 iMac and cylindrical Mac Pro. The 21.5 inch 2017 iMac is the only ...
According to the Apple white paper, iOS includes a Device Firmware Upgrade (DFU) mode, and that "[r]estoring a device after it enters DFU mode returns it to a known good state with the certainty that only unmodified Apple-signed code is present." Apple ordered to assist the FBI. The FBI recovered an Apple iPhone 5C—owned by the San Bernardino ...