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  2. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    Power supply may be bad Long continuous beep tone Memory failure Steady, long beeps Power supply bad No beep Power supply bad, system not plugged in, or power not turned on No beep If everything seems to be functioning correctly there may be a problem with the 'beeper' itself. The system will normally beep one short beep. One long, two short beeps

  3. Macintosh startup - Wikipedia

    en.wikipedia.org/wiki/Macintosh_startup

    This iteration would be used for all versions of Classic Mac OS up to Mac OS 9.2.2, the last version of the Classic Mac OS operating system. In all instances, the "Restart" button would be present, which would allow the user to restart the computer from the operating system as the bomb screen typically prevents the user from further using the ...

  4. MacBook Air - Wikipedia

    en.wikipedia.org/wiki/MacBook_Air

    Steve Jobs introduced the MacBook Air during Apple’s keynote address at the 2008 Macworld conference on January 15, 2008. [4] The first MacBook Air was a 13.3-inch model, initially promoted as the world's thinnest notebook at 1.9 cm (0.75 in) (a previous record holder, 2005's Toshiba Portege R200, was 1.98 cm (0.78 in) high).

  5. MacBook Air (Apple silicon) - Wikipedia

    en.wikipedia.org/wiki/MacBook_Air_(Apple_silicon)

    MacBook Air (M1, 2020) On November 10, 2020, Apple announced an updated MacBook Air with an Apple-designed M1 system-on-a-chip (SoC), launched alongside an updated Mac Mini and 13-inch MacBook Pro as the first Macs with Apple's new line of custom ARM-based Apple silicon processors. [6]

  6. macOS Monterey - Wikipedia

    en.wikipedia.org/wiki/MacOS_Monterey

    macOS Monterey is the final version of macOS that supports the 2015–2017 MacBook Air, Retina MacBook Pro, 2014 Mac Mini, 2015 iMac and cylindrical Mac Pro, as its successor, macOS Ventura, drops support for those models. It is the last version of macOS that can run on Macs with 4GB of RAM.

  7. Troubleshooting - Wikipedia

    en.wikipedia.org/wiki/Troubleshooting

    Troubleshooting is a form of problem solving, often applied to repair failed products or processes on a machine or a system. It is a logical, systematic search for the source of a problem in order to solve it, and make the product or process operational again. Troubleshooting is needed to identify the symptoms.

  8. macOS version history - Wikipedia

    en.wikipedia.org/wiki/MacOS_version_history

    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 their ...

  9. Power cycling - Wikipedia

    en.wikipedia.org/wiki/Power_cycling

    Power cycling is the act of turning a piece of equipment, usually a computer, off and then on again. Reasons for power cycling include having an electronic device reinitialize its set of configuration parameters or recover from an unresponsive state of its mission critical functionality, such as in a crash or hang situation.