Connected, but
missing from Finder.
See whether macOS lists a device, a disk or a volume — and how that differs from seeing it in Finder.
A clearer view of your connections
USB drive not
showing up?
Find out why.
Meet Port RJ for Mac. A planned app for understanding USB devices, external drives and hubs — showing what your Mac detects and helping you choose a clear next step.
Application concept · currently in development
No installer is available on this page. The preview shows the intended experience; features may change during development.
Port RJInterface preview
USB Flash Drive
USB storage · example device
- Device detected
- Storage available
- Volume not mounted
Mount volume
Requires confirmation
Designed around your Mac USB devices, drives & hubs Understand before taking action
Familiar problem. Clearer context.
Plugged in.
Still a question mark?
“It isn't showing up” can describe different situations. Port RJ is being designed to help you tell them apart.
Connected, but
Direct works.
Through a hub doesn't.
Compare a direct connection with the hub path. Follow a structured cable, port and hub A/B check.
An accessory
needs your attention.
Understand when an accessory-access setting may be relevant, with guidance for reviewing it on your Mac.
Here one moment.
Gone the next.
Use a planned connection-event view to follow arrivals and disconnects while you change one thing at a time.
The planned workflow
Less trial and error.
More useful next steps.
A simple path from “what's connected?” to “what should I check?” You stay in control of each action.
See what your Mac detects.
Build a view of connected USB devices, disks and volumes. Start with what appears in the system rather than guessing from Finder alone.
Put the signals in context.
Review connection paths, disk and volume status, and relevant accessory-access guidance. A device being listed is a clue, not proof that it works correctly.
Change one thing at a time.
Follow clear checks for a direct connection, another cable or a different port. Compare what changes and keep a record of the steps you've tried.
Diagnostic context helps you investigate. It does not guarantee a repair, fix failed hardware or make every device compatible.
An early look
A little clarity.
All in one place.
Explore three concept screens. These illustrate the proposed app design, with example devices and statuses.
Start with the connection map.
The planned overview brings detected USB devices, disks and volumes into one view. The devices and statuses shown here are illustrative examples.
Open full-size concept
Understand the signal, then choose a check.
The diagnosis concept explains what an example status means and suggests a guided next step. It does not report a test of your own device.
Open full-size concept
Keep track of what changed.
The activity concept illustrates a connection-event timeline for comparing checks. Event times, device names and results in this preview are example data.
Open full-size conceptDesign concepts, not screenshots of a released application. Port RJ is in development; the final interface and available features may differ.
Built around the investigation
Useful details.
Without the guesswork.
These are the capabilities planned for Port RJ. The goal is to explain the situation clearly, then guide the next check.
Follow the connection.
A planned view of enumerated USB devices and their connection paths, so you can distinguish a directly connected device from one behind a hub.
Mac→Hub→Drive
A disk isn't a Finder window.
Planned disk and volume information helps explain the difference between a detected drive, an unmounted volume and a volume visible in Finder.
A next step you can follow.
Guidance for reviewing relevant accessory-access settings and comparing cables, ports, a hub path and a direct connection. No instruction to disable macOS security.
Notice the pattern.
A planned event log records connection and disconnection observations while you investigate. It provides context for intermittent problems, rather than a guaranteed diagnosis.
Can I download Port RJ now?
No installer is available on this website. Port RJ is an application concept currently in development. The preview illustrates the intended interface and workflow; it is not a released application.
What devices is the app being designed for?
The concept focuses on USB-connected devices, external storage and USB-C hubs on Mac. USB-C describes a connection type; a connector alone does not confirm a cable's or device's capabilities. Compatibility and system requirements will be documented for the eventual build.
Does “detected” mean a drive is working?
No. A listed USB device, a detected disk, a mounted volume and a volume visible in Finder are different observations. Port RJ is being designed to make those distinctions easier to understand. Detection alone does not confirm that a device, cable or file system is healthy.
Will Port RJ repair or reset a USB port?
The concept is for diagnostic context and guided checks. It does not promise automatic USB-port resets, power repair, recovery of missing files or a repair of damaged hardware. A guided investigation may still lead to a cable replacement, compatibility check or hardware-service enquiry.
Will I need to change macOS security settings?
The planned guidance may explain relevant accessory-access settings where they are available on your Mac. It should help you review a specific setting and understand the choice. The product concept does not ask you to disable macOS security or bypass an unexplained warning.
Are the devices in the preview from my Mac?
No. The concept screens use example devices, statuses and event times. This website does not enumerate your USB devices, run diagnostics on your Mac or change device settings. Click the screen tabs to explore the design, not to run a hardware test.
Let's make the next step clearer.
A question is
a good place to start.
Ask about Port RJ's product concept or the planned experience.
Contact support [email protected]Share a description of your question.
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