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  2. Macintosh startup - Wikipedia

    en.wikipedia.org/wiki/Macintosh_startup

    Starting with the 2016 MacBook Pro, all new Macs were shipped without a startup chime, with the Macs silently booting when powered on. [7] The startup chime would later be added to these models (and all subsequent models since) with the release of macOS Big Sur in 2020, which can be enabled or disabled in System Preferences. [19]

  3. Apple keyboards - Wikipedia

    en.wikipedia.org/wiki/Apple_keyboards

    (M7803, 109 black keys) Originally introduced as the Apple Pro Keyboard in 2000, but discontinued three years later, this keyboard reintroduced the additional extended function keys last seen in the Apple Design Keyboard and debuted in a clear case with black keys. One major departure from all previous ADB and USB keyboards was the removal of ...

  4. Magic Keyboard (Mac) - Wikipedia

    en.wikipedia.org/wiki/Magic_Keyboard_(Mac)

    The keyboards are bundled with the iMac and Mac Pro, and also sold as standalone accessories. They replaced the Apple Wireless Keyboard product line. Each Magic Keyboard model combination has a compact or full-size key layout for a specific region, a function key or Touch ID sensor next to F12, and color scheme variant.

  5. Magic SysRq key - Wikipedia

    en.wikipedia.org/wiki/Magic_SysRq_key

    The magic SysRq key is a key combination understood by the Linux kernel, which allows the user to perform various low-level commands regardless of the system's state. It is often used to recover from freezes , or to reboot a computer without corrupting the filesystem . [ 1 ]

  6. Option key - Wikipedia

    en.wikipedia.org/wiki/Option_key

    The Option key may be labeled Alt, Option, ⌥, or any combination thereof. The Option key, ⌥, is a modifier key present on Apple keyboards. It is located between the Control key and the Command key on a typical Mac keyboard. There are two Option keys on modern (as of 2020) Mac desktop and notebook keyboards, one on each side of the space bar.

  7. Key-recovery attack - Wikipedia

    en.wikipedia.org/wiki/Key-recovery_attack

    In cryptography, the key-recovery advantage (KR advantage) of a particular algorithm is a measure of how effective an algorithm can mount a key-recovery attack. Consequently, the maximum key-recovery advantage attainable by any algorithm with a fixed amount of computational resources is a measure of how difficult it is to recover a cipher's key.

  8. Message authentication code - Wikipedia

    en.wikipedia.org/wiki/Message_authentication_code

    Formally, a message authentication code (MAC) system is a triple of efficient [4] algorithms (G, S, V) satisfying: G (key-generator) gives the key k on input 1 n, where n is the security parameter. S (signing) outputs a tag t on the key k and the input string x. V (verifying) outputs accepted or rejected on inputs: the key k, the string x and ...

  9. Command key - Wikipedia

    en.wikipedia.org/wiki/Command_key

    The Command key (sometimes abbreviated as Cmd key), ⌘, formerly also known as the Apple key or open Apple key, is a modifier key present on Apple keyboards. The Command key's purpose is to allow the user to enter keyboard commands in applications and in the system .