- Typical camera software (Capture One, Lightroom, and others) has special workflow behaviors for devices flagged by the operating system as removable media. (Personally, I'm trying to use the Capture One "Delete after import" flag).
- MacOS flags some CFExpress devices as non-removable SSDs rather than removable media (References: (https://discussions.apple.com/thread/254919311?sortBy=rank) , (https://discussions.apple.com/thread/252410911) , (https://discussions.apple.com/thread/252153280?sortBy=rank)) . This appears not to be specific to MacOS; there are similar reports on Windows and Linux, though in the latter it can be overridden by udev rules.
- CFExpress is increasingly common for cameras that require high write performance
Is there a way to solve this by updating MacOS configuration (as udev rules can override the way hardware presents itself on Linux), or do we need to be making feature requests to the developers of software that trusts the operating system's designation of devices as removable or otherwise to allow that designation to be overridden?
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$ diskutil info /dev/disk4
Device Identifier: disk4
Device Node: /dev/disk4
Whole: Yes
Part of Whole: disk4
Device / Media Name: TAPIR SANSA_20 Media
Volume Name: Not applicable (no file system)
Mounted: Not applicable (no file system)
File System: None
Content (IOContent): FDisk_partition_scheme
OS Can Be Installed: No
Media Type: Generic
Protocol: USB
SMART Status: Not Supported
Disk Size: 512.1 GB (512110190592 Bytes) (exactly 1000215216 512-Byte-Units)
Device Block Size: 512 Bytes
Media OS Use Only: No
Media Read-Only: No
Volume Read-Only: Not applicable (no file system)
Device Location: External
Removable Media: Fixed
Solid State: Yes
Virtual: No
Note Removable Media: Fixed
.
Asked by Charles Duffy
(353 rep)
Jun 28, 2025, 02:31 PM
Last activity: Jun 29, 2025, 04:09 AM
Last activity: Jun 29, 2025, 04:09 AM