FIELD GUIDESource-led reference
Port & Cable

P102 / General / Guide

A storage device is missing on a Mac

Observe one change at a time. Keep the scope and stop conditions visible.

The useful distinction

Observation-only inventory in macOS Disk Utility. No writing, repair, mounting, unlocking, initialization, formatting or recovery procedure.

Claim inspection dates: 2026-10-02 · Independent review pending

Guide note · not an individual product specification

The useful distinction

Understand the requirement.

Disk Utility can show the physical device hierarchy separately from a volumes-only view. [C102A]

Bounded facts, visible unknowns

Specifications and limits

A storage device is missing on a Mac facts and limitations
Scoped source anchorDisk Utility can show the physical device hierarchy separately from a volumes-only view. [C102A]
Verified device listNot included. Check exact device and accessory documentation.
A boundary, not an omission to guess around.

Attaching a saved brief retains a snapshot. It does not edit the brief, approve a connection, refresh a source or establish that equipment is safe.

Before you connect

What to check

  1. Record whether important data exists and whether a backup is available. If uncertain, stop before any storage-changing operation.
  2. In Disk Utility, use View → Show All Devices and only observe the sidebar. Do not select repair or erase actions.
  3. Record whether a physical device, containers or volumes appear. Absence here is not a diagnosis of the cable or drive.
  4. If asked to initialize or erase a drive that may hold data, cancel and record a stop condition. Do not attempt recovery here.
  5. Summarize what was visible, the exact equipment and data concerns for the device maker or a qualified recovery service.
Trace a supported connection class →

Keep the next person informed

Save locally or export an editable case. A separate redacted support report omits private text by default; inspect every report before sharing it.

Your next step

Move from the form to the requirement.

Compare this field note See the differences without assuming interchangeability.Work through a connection Choose your task before deciding on a cable.Explore this evidence trail Inspect the claims and their dependencies. (private workspace)

The source trail

Evidence for this page

AI-assisted inspection is not independent engineering review. Source scope and access limitations are disclosed below. Procedural checklists are editorial requirements, not hardware measurements.

C102ASource checked · pending review

Disk Utility can show the physical device hierarchy separately from a volumes-only view.

Apple · Disk Utility device and volume display ↗

Locator: Device hierarchy view and volumes-only view
Access: public page. Viewing the device hierarchy only. Repair, mounting, initialization, erasing and recovery commands are deliberately outside this workflow. No physical hardware testing or independent approval.

S085: full source recordInspect review dependencies → (private workspace)

Claim scope: Observation-only inventory in macOS Disk Utility. No writing, repair, mounting, unlocking, initialization, formatting or recovery procedure.. Next review due 2026-12-31.

Suggest a correction to this field note →

Working checklist / macOS

Keep your observations with the checks.

Observation-only inventory in macOS Disk Utility. No writing, repair, mounting, unlocking, initialization, formatting or recovery procedure.

Open this troubleshooting checklist → (private workspace)Choose another symptom

The checklist records your observations. It cannot test hardware or approve compatibility.

Evidence behind this page

Scope first. Source second. Approval separate.

1 linked sources · 1 scoped claims · 0 sources with inspection/access flags.

Page scope: consumer_pilot

Assessment 2026-10-22 · earliest scheduled source review 2026-12-31. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 1 source scopes, access limits and dates

S085 · Disk Utility device and volume display

Apple · Manufacturer / product-owner domain · inspected 2026-10-02 · due 2026-12-31

Within inspection window

Scoped support: Viewing the device hierarchy only. Repair, mounting, initialization, erasing and recovery commands are deliberately outside this workflow.

Not established / limitations: Viewing the device hierarchy only. Repair, mounting, initialization, erasing and recovery commands are deliberately outside this workflow. No physical hardware testing or independent approval.

Locator: Device hierarchy view and volumes-only view

Trace 1 claims to their source records

C102A · P102

Disk Utility can show the physical device hierarchy separately from a volumes-only view.

Claim scope: Observation-only inventory in macOS Disk Utility. No writing, repair, mounting, unlocking, initialization, formatting or recovery procedure.

Source links: S085 · Evidence trail → (private workspace)

Prepare this page for review → (private workspace)Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.