Fujifilm X100 not mounting after OS27 Update to Mac mini M2Pro

The behavior you are experiencing is quite common following major macOS updates. Because Apple Photos can still see the camera, your hardware (the M2 Pro Mac mini, your USB-C cable, and the camera port) is communicating fine.

The issue is that macOS 27 Golden Gate handles unassigned or unnamed camera filesystems differently, which stops the camera from mounting as a mass-storage drive in Finder or acting as a direct source inside Lightroom Classic.

Here is how to resolve the issue and get your workflow back:

The Root Cause: PTP vs. Mass Storage

When a Fujifilm camera connects via USB, it communicates using PTP (Picture Transfer Protocol) rather than mounting as an actual external storage drive. Apple Photos and the native Image Capture utility are designed to hook directly into PTP devices. Finder and Lightroom Classic, however, look for an active storage volume. Major OS upgrades often reset permissions or alter how the system exposes these PTP paths to third-party applications.

More info from Apple: Import from a camera or phone in Photos on Mac – Apple Support

Grant Lightroom Full Disk Access

Often, OS upgrades tighten privacy controls, blocking third-party apps like Lightroom from accessing external devices or protocols.

• Click the Apple Menu  and select System Settings.
• Go to Privacy & Security on the sidebar.
• Click on Full Disk Access.
• Look for Adobe Lightroom Classic in the list. If it's disabled, toggle it ON. If it isn't listed, click the +icon at the bottom, navigate to your Applications folder, and manually add Lightroom.
• Restart Lightroom and check if your X100VI appears under the "Devices" dropdown in the Import window.

Change the Camera's Connection Setting

If Lightroom still won't fetch photos natively, check your X100VI menu options (these are from Google, I don't have a Fuji camera).

• Go to Setup Menu (Wrench icon) > Connection Setting.
• Look for Connection Mode or USB Power Supply/Comm Setting.
• Ensure it is explicitly set to USB CARD READER (not X RAW STUDIO or USB RAW CONV./BACKUP). This forces the camera to act as a storage class device, though macOS may still choose not to mount the root folder directly in Finder. 

The Recommended Solution: Use an External Card Reader

While hooking up the camera via USB-C is convenient, using a dedicated SD card reader is highly recommended for macOS workflows.

• Reliability: Fujifilm cameras do not give a unique volume name to the root structure when formatting cards inside the camera body, causing ongoing mounting bugs with macOS Finder. An external card reader bypasses camera protocol conflicts entirely.
• Speed: Transferring RAW files through an external reader is significantly faster than relying on the camera's internal processing bus.
• Battery: It saves your X100VI battery from depleting while importing large batches of files.

Personally, I use a card reader to import photos from my Canon cameras (A ProGrade USB-C CFe/SD reader for the CFe cards from the R1, either that reader or the built-in SD slots on my Mac or Thunderbolt dock for the SD cards from my R8, M6II, M6 and PowerShot V1 as well as my camcorder). All could be directly connected, but I find the card reader easier and faster.

If you prefer using the cable, you can also use the built-in Image Capture app on your Mac to drag the files into a temporary local folder, then import that folder into Lightroom.

More info from Apple: Image Capture User Guide for Mac – Apple Support

Thanks you for that thorough response. Granting Lightroom full disc access has solved my issue. I've successfully imported the files directly from the camera as before. Also, I neglected to mention that the SD card does mount on the desktop when read via my CalDigit hub's slot.

Great information for reference. Thanks again.