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Device evidence task · MacBook Air M1

Built-in speakers versus redirected audio

Compare selected output and local playback before a speaker service request.

Version 2.0.0 · About 20 minutes to organize observations

Planning estimate for recording observations; excludes charging, backups, drying and service. Not a measured repair time.

Confirm the exact model

Enable JavaScript to record observations. The complete preparation guide is available below.

Preparation guide

  1. Try a known local file and inspect the app volume. Select a second file to distinguish one silent source from a silent output.

    Source: No sound from Mac speakers · Opening → app volume / different file

  2. Disconnect headphones and external speakers. Record the currently selected output category; a display or USB device may be receiving the sound.

    Source: No sound from Mac speakers · Built-in / external / display outputs

  3. In System Settings → Sound → Output, select the Mac speakers, set a comfortable level and clear mute. Earlier macOS uses System Preferences; use its matching guide.

    Source: No sound from Mac speakers · Built-in speakers, steps 2–4

  4. Replay both local sources on the same built-in output. If compatible owned headphones are available, compare them afterward without increasing volume excessively.

    Source: No sound from Mac speakers · Built-in and external audio output; original controlled comparison

  5. If local playback works but calls do not, retain the call-only distinction. If built-in output is absent or silent across local sources, take that observation to Apple.

    Source: No sound from Mac speakers · Output and app-volume guidance; original service routing

Original schematic locating Sound Output, Accessibility Keyboard and Pointer Control, and sleep-related settings; older macOS labels differ.
Original schematic of setting relationships. Use the guide version matching installed macOS; this is not a screenshot. · Original schematic; follow the linked manufacturer instructions.

Check the result

  • App and system volume are distinguished.
  • Call-only failure has a local comparison.
Stop conditions
  • Stop using and charging equipment with swelling, casing separation, smoke, a burning smell or suspected battery damage. Do not open or press on it.
  • Set damaged accessories aside. Do not open mains adapters or force connectors.
  • Do not erase, reset, flash firmware or bypass a lock as a default diagnostic step.
Official sources and model fit
  1. No sound from Mac speakers

    Opening / Built-in speakers / External outputs · Checked 2026-10-13
    App volume, local source and selected built-in output
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  2. Important safety information for your Mac

    Handling / Built-in battery / Charging · Checked 2026-10-13
    General damaged-equipment and moisture safety only; M1-specific connections are sourced from mac-spec
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  3. Identify MacBook Air model

    Find model / MacBook Air M1 2020 · Checked 2026-10-04
    Model and chip confirmation
    Reference only. Original paraphrase; no copied images or manual pages.

  4. MacBook Air (M1, 2020) technical specifications

    Charging and Expansion / Display Support · Checked 2026-10-13
    Two USB-C Thunderbolt/USB4 ports and one native external display up to 6K at 60 Hz
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  5. Use Apple Diagnostics to test your Mac

    Prepare / Apple silicon / Run Apple Diagnostics / Results · Checked 2026-10-13
    M1 Options then Command-D; Tahoe 26+ selected tests versus earlier automatic testing; preserve reference code
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  6. Mac does not respond to key presses

    Built-in keyboard / Other keys · Checked 2026-10-13
    Low battery, Slow Keys, Mouse Keys and input layout
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

  7. Mac sleeps or wakes unexpectedly

    Check sleep settings / Network access / Sharing / Activity / Something else is waking your Mac · Checked 2026-10-13
    Sleep/wake settings, background activity and peripheral comparison
    Reference only. Original paraphrase and observation worksheets; no copied images or manual pages.

Original preparation workflow based on the linked documents. No hands-on device repair testing is claimed.

Related preparation

Exact modelSymptom & recordOpen